id sid tid token lemma pos cord-191574-1g38scnj 1 1 key key JJ cord-191574-1g38scnj 1 2 : : : cord-191574-1g38scnj 1 3 cord-191574 cord-191574 NNP cord-191574-1g38scnj 1 4 - - HYPH cord-191574-1g38scnj 1 5 1g38scnj 1g38scnj CD cord-191574-1g38scnj 1 6 authors author NNS cord-191574-1g38scnj 1 7 : : : cord-191574-1g38scnj 1 8 Harko Harko NNP cord-191574-1g38scnj 1 9 , , , cord-191574-1g38scnj 1 10 Tiberiu Tiberiu NNP cord-191574-1g38scnj 1 11 ; ; : cord-191574-1g38scnj 1 12 Mak Mak NNP cord-191574-1g38scnj 1 13 , , , cord-191574-1g38scnj 1 14 Man Man NNP cord-191574-1g38scnj 1 15 Kwong Kwong NNP cord-191574-1g38scnj 2 1 title title NN cord-191574-1g38scnj 2 2 : : : cord-191574-1g38scnj 2 3 Series series NN cord-191574-1g38scnj 2 4 solution solution NN cord-191574-1g38scnj 2 5 of of IN cord-191574-1g38scnj 2 6 the the DT cord-191574-1g38scnj 2 7 Susceptible susceptible JJ cord-191574-1g38scnj 2 8 - - HYPH cord-191574-1g38scnj 2 9 Infected Infected NNP cord-191574-1g38scnj 2 10 - - HYPH cord-191574-1g38scnj 2 11 Recovered recovered JJ cord-191574-1g38scnj 2 12 ( ( -LRB- cord-191574-1g38scnj 2 13 SIR SIR NNP cord-191574-1g38scnj 2 14 ) ) -RRB- cord-191574-1g38scnj 2 15 epidemic epidemic NN cord-191574-1g38scnj 2 16 model model NN cord-191574-1g38scnj 2 17 with with IN cord-191574-1g38scnj 2 18 vital vital JJ cord-191574-1g38scnj 2 19 dynamics dynamic NNS cord-191574-1g38scnj 2 20 via via IN cord-191574-1g38scnj 2 21 the the DT cord-191574-1g38scnj 2 22 Adomian Adomian NNP cord-191574-1g38scnj 2 23 and and CC cord-191574-1g38scnj 2 24 Laplace Laplace NNP cord-191574-1g38scnj 2 25 - - HYPH cord-191574-1g38scnj 2 26 Adomian Adomian NNP cord-191574-1g38scnj 2 27 Decomposition decomposition NN cord-191574-1g38scnj 2 28 Methods Methods NNPS cord-191574-1g38scnj 2 29 date date NN cord-191574-1g38scnj 2 30 : : : cord-191574-1g38scnj 2 31 2020 2020 CD cord-191574-1g38scnj 2 32 - - HYPH cord-191574-1g38scnj 2 33 08 08 CD cord-191574-1g38scnj 2 34 - - HYPH cord-191574-1g38scnj 2 35 28 28 CD cord-191574-1g38scnj 2 36 journal journal NN cord-191574-1g38scnj 2 37 : : : cord-191574-1g38scnj 2 38 nan nan NNP cord-191574-1g38scnj 2 39 DOI DOI NNP cord-191574-1g38scnj 2 40 : : : cord-191574-1g38scnj 2 41 nan nan NNP cord-191574-1g38scnj 2 42 sha sha NNP cord-191574-1g38scnj 2 43 : : : cord-191574-1g38scnj 3 1 26ad48f61f8d6fe11dc94400795cdb6178d3a55c 26ad48f61f8d6fe11dc94400795cdb6178d3a55c CD cord-191574-1g38scnj 3 2 doc_id doc_id CD cord-191574-1g38scnj 3 3 : : : cord-191574-1g38scnj 3 4 191574 191574 CD cord-191574-1g38scnj 3 5 cord_uid cord_uid NNS cord-191574-1g38scnj 3 6 : : : cord-191574-1g38scnj 4 1 1g38scnj 1g38scnj CD cord-191574-1g38scnj 5 1 The the DT cord-191574-1g38scnj 5 2 Susceptible susceptible JJ cord-191574-1g38scnj 5 3 - - HYPH cord-191574-1g38scnj 5 4 Infected infected JJ cord-191574-1g38scnj 5 5 - - HYPH cord-191574-1g38scnj 5 6 Recovered recovered JJ cord-191574-1g38scnj 5 7 ( ( -LRB- cord-191574-1g38scnj 5 8 SIR SIR NNP cord-191574-1g38scnj 5 9 ) ) -RRB- cord-191574-1g38scnj 5 10 epidemic epidemic NN cord-191574-1g38scnj 5 11 model model NN cord-191574-1g38scnj 5 12 as as RB cord-191574-1g38scnj 5 13 well well RB cord-191574-1g38scnj 5 14 as as IN cord-191574-1g38scnj 5 15 its -PRON- PRP$ cord-191574-1g38scnj 5 16 generalizations generalization NNS cord-191574-1g38scnj 5 17 are be VBP cord-191574-1g38scnj 5 18 extensively extensively RB cord-191574-1g38scnj 5 19 used use VBN cord-191574-1g38scnj 5 20 for for IN cord-191574-1g38scnj 5 21 the the DT cord-191574-1g38scnj 5 22 study study NN cord-191574-1g38scnj 5 23 of of IN cord-191574-1g38scnj 5 24 the the DT cord-191574-1g38scnj 5 25 spread spread NN cord-191574-1g38scnj 5 26 of of IN cord-191574-1g38scnj 5 27 infectious infectious JJ cord-191574-1g38scnj 5 28 diseases disease NNS cord-191574-1g38scnj 5 29 , , , cord-191574-1g38scnj 5 30 and and CC cord-191574-1g38scnj 5 31 for for IN cord-191574-1g38scnj 5 32 the the DT cord-191574-1g38scnj 5 33 understanding understanding NN cord-191574-1g38scnj 5 34 of of IN cord-191574-1g38scnj 5 35 the the DT cord-191574-1g38scnj 5 36 dynamical dynamical JJ cord-191574-1g38scnj 5 37 evolution evolution NN cord-191574-1g38scnj 5 38 of of IN cord-191574-1g38scnj 5 39 epidemics epidemic NNS cord-191574-1g38scnj 5 40 . . . cord-191574-1g38scnj 6 1 From from IN cord-191574-1g38scnj 6 2 SIR SIR NNP cord-191574-1g38scnj 6 3 type type NN cord-191574-1g38scnj 6 4 models model NNS cord-191574-1g38scnj 6 5 only only RB cord-191574-1g38scnj 6 6 the the DT cord-191574-1g38scnj 6 7 model model NN cord-191574-1g38scnj 6 8 without without IN cord-191574-1g38scnj 6 9 vital vital JJ cord-191574-1g38scnj 6 10 dynamics dynamic NNS cord-191574-1g38scnj 6 11 has have VBZ cord-191574-1g38scnj 6 12 an an DT cord-191574-1g38scnj 6 13 exact exact JJ cord-191574-1g38scnj 6 14 analytic analytic JJ cord-191574-1g38scnj 6 15 solution solution NN cord-191574-1g38scnj 6 16 , , , cord-191574-1g38scnj 6 17 which which WDT cord-191574-1g38scnj 6 18 can can MD cord-191574-1g38scnj 6 19 be be VB cord-191574-1g38scnj 6 20 obtained obtain VBN cord-191574-1g38scnj 6 21 in in IN cord-191574-1g38scnj 6 22 an an DT cord-191574-1g38scnj 6 23 exact exact JJ cord-191574-1g38scnj 6 24 parametric parametric JJ cord-191574-1g38scnj 6 25 form form NN cord-191574-1g38scnj 6 26 . . . cord-191574-1g38scnj 7 1 The the DT cord-191574-1g38scnj 7 2 SIR SIR NNP cord-191574-1g38scnj 7 3 model model NN cord-191574-1g38scnj 7 4 with with IN cord-191574-1g38scnj 7 5 vital vital JJ cord-191574-1g38scnj 7 6 dynamics dynamic NNS cord-191574-1g38scnj 7 7 , , , cord-191574-1g38scnj 7 8 the the DT cord-191574-1g38scnj 7 9 simplest simple JJS cord-191574-1g38scnj 7 10 extension extension NN cord-191574-1g38scnj 7 11 of of IN cord-191574-1g38scnj 7 12 the the DT cord-191574-1g38scnj 7 13 basic basic JJ cord-191574-1g38scnj 7 14 SIR SIR NNP cord-191574-1g38scnj 7 15 model model NN cord-191574-1g38scnj 7 16 , , , cord-191574-1g38scnj 7 17 does do VBZ cord-191574-1g38scnj 7 18 not not RB cord-191574-1g38scnj 7 19 admit admit VB cord-191574-1g38scnj 7 20 a a DT cord-191574-1g38scnj 7 21 closed closed JJ cord-191574-1g38scnj 7 22 form form NN cord-191574-1g38scnj 7 23 representation representation NN cord-191574-1g38scnj 7 24 of of IN cord-191574-1g38scnj 7 25 the the DT cord-191574-1g38scnj 7 26 solution solution NN cord-191574-1g38scnj 7 27 . . . cord-191574-1g38scnj 8 1 However however RB cord-191574-1g38scnj 8 2 , , , cord-191574-1g38scnj 8 3 in in IN cord-191574-1g38scnj 8 4 order order NN cord-191574-1g38scnj 8 5 to to TO cord-191574-1g38scnj 8 6 perform perform VB cord-191574-1g38scnj 8 7 the the DT cord-191574-1g38scnj 8 8 comparison comparison NN cord-191574-1g38scnj 8 9 with with IN cord-191574-1g38scnj 8 10 the the DT cord-191574-1g38scnj 8 11 epidemiological epidemiological JJ cord-191574-1g38scnj 8 12 data data NN cord-191574-1g38scnj 8 13 accurate accurate JJ cord-191574-1g38scnj 8 14 representations representation NNS cord-191574-1g38scnj 8 15 of of IN cord-191574-1g38scnj 8 16 the the DT cord-191574-1g38scnj 8 17 time time NN cord-191574-1g38scnj 8 18 evolution evolution NN cord-191574-1g38scnj 8 19 of of IN cord-191574-1g38scnj 8 20 the the DT cord-191574-1g38scnj 8 21 SIR SIR NNP cord-191574-1g38scnj 8 22 model model NN cord-191574-1g38scnj 8 23 with with IN cord-191574-1g38scnj 8 24 vital vital JJ cord-191574-1g38scnj 8 25 dynamics dynamic NNS cord-191574-1g38scnj 8 26 would would MD cord-191574-1g38scnj 8 27 be be VB cord-191574-1g38scnj 8 28 very very RB cord-191574-1g38scnj 8 29 useful useful JJ cord-191574-1g38scnj 8 30 . . . cord-191574-1g38scnj 9 1 In in IN cord-191574-1g38scnj 9 2 the the DT cord-191574-1g38scnj 9 3 present present JJ cord-191574-1g38scnj 9 4 paper paper NN cord-191574-1g38scnj 9 5 , , , cord-191574-1g38scnj 9 6 we -PRON- PRP cord-191574-1g38scnj 9 7 obtain obtain VBP cord-191574-1g38scnj 9 8 first first RB cord-191574-1g38scnj 9 9 the the DT cord-191574-1g38scnj 9 10 basic basic JJ cord-191574-1g38scnj 9 11 evolution evolution NN cord-191574-1g38scnj 9 12 equation equation NN cord-191574-1g38scnj 9 13 of of IN cord-191574-1g38scnj 9 14 the the DT cord-191574-1g38scnj 9 15 SIR SIR NNP cord-191574-1g38scnj 9 16 model model NN cord-191574-1g38scnj 9 17 with with IN cord-191574-1g38scnj 9 18 vital vital JJ cord-191574-1g38scnj 9 19 dynamics dynamic NNS cord-191574-1g38scnj 9 20 , , , cord-191574-1g38scnj 9 21 which which WDT cord-191574-1g38scnj 9 22 is be VBZ cord-191574-1g38scnj 9 23 given give VBN cord-191574-1g38scnj 9 24 by by IN cord-191574-1g38scnj 9 25 a a DT cord-191574-1g38scnj 9 26 strongly strongly RB cord-191574-1g38scnj 9 27 nonlinear nonlinear JJ cord-191574-1g38scnj 9 28 second second JJ cord-191574-1g38scnj 9 29 order order NN cord-191574-1g38scnj 9 30 differential differential NN cord-191574-1g38scnj 9 31 equation equation NN cord-191574-1g38scnj 9 32 . . . cord-191574-1g38scnj 10 1 Then then RB cord-191574-1g38scnj 10 2 we -PRON- PRP cord-191574-1g38scnj 10 3 obtain obtain VBP cord-191574-1g38scnj 10 4 a a DT cord-191574-1g38scnj 10 5 series series NN cord-191574-1g38scnj 10 6 representation representation NN cord-191574-1g38scnj 10 7 of of IN cord-191574-1g38scnj 10 8 the the DT cord-191574-1g38scnj 10 9 solution solution NN cord-191574-1g38scnj 10 10 of of IN cord-191574-1g38scnj 10 11 the the DT cord-191574-1g38scnj 10 12 model model NN cord-191574-1g38scnj 10 13 , , , cord-191574-1g38scnj 10 14 by by IN cord-191574-1g38scnj 10 15 using use VBG cord-191574-1g38scnj 10 16 the the DT cord-191574-1g38scnj 10 17 Adomian Adomian NNP cord-191574-1g38scnj 10 18 and and CC cord-191574-1g38scnj 10 19 Laplace Laplace NNP cord-191574-1g38scnj 10 20 - - HYPH cord-191574-1g38scnj 10 21 Adomian Adomian NNP cord-191574-1g38scnj 10 22 Decomposition decomposition NN cord-191574-1g38scnj 10 23 Methods Methods NNPS cord-191574-1g38scnj 10 24 to to TO cord-191574-1g38scnj 10 25 solve solve VB cord-191574-1g38scnj 10 26 the the DT cord-191574-1g38scnj 10 27 dynamical dynamical JJ cord-191574-1g38scnj 10 28 evolution evolution NN cord-191574-1g38scnj 10 29 equation equation NN cord-191574-1g38scnj 10 30 of of IN cord-191574-1g38scnj 10 31 the the DT cord-191574-1g38scnj 10 32 model model NN cord-191574-1g38scnj 10 33 . . . cord-191574-1g38scnj 11 1 The the DT cord-191574-1g38scnj 11 2 solutions solution NNS cord-191574-1g38scnj 11 3 are be VBP cord-191574-1g38scnj 11 4 expressed express VBN cord-191574-1g38scnj 11 5 in in IN cord-191574-1g38scnj 11 6 the the DT cord-191574-1g38scnj 11 7 form form NN cord-191574-1g38scnj 11 8 of of IN cord-191574-1g38scnj 11 9 infinite infinite JJ cord-191574-1g38scnj 11 10 series series NN cord-191574-1g38scnj 11 11 . . . cord-191574-1g38scnj 12 1 The the DT cord-191574-1g38scnj 12 2 series series NN cord-191574-1g38scnj 12 3 representations representation NNS cord-191574-1g38scnj 12 4 of of IN cord-191574-1g38scnj 12 5 the the DT cord-191574-1g38scnj 12 6 time time NN cord-191574-1g38scnj 12 7 evolution evolution NN cord-191574-1g38scnj 12 8 of of IN cord-191574-1g38scnj 12 9 the the DT cord-191574-1g38scnj 12 10 SIR SIR NNP cord-191574-1g38scnj 12 11 model model NN cord-191574-1g38scnj 12 12 with with IN cord-191574-1g38scnj 12 13 vital vital JJ cord-191574-1g38scnj 12 14 dynamics dynamic NNS cord-191574-1g38scnj 12 15 are be VBP cord-191574-1g38scnj 12 16 compared compare VBN cord-191574-1g38scnj 12 17 with with IN cord-191574-1g38scnj 12 18 the the DT cord-191574-1g38scnj 12 19 exact exact JJ cord-191574-1g38scnj 12 20 numerical numerical JJ cord-191574-1g38scnj 12 21 solutions solution NNS cord-191574-1g38scnj 12 22 of of IN cord-191574-1g38scnj 12 23 the the DT cord-191574-1g38scnj 12 24 model model NN cord-191574-1g38scnj 12 25 , , , cord-191574-1g38scnj 12 26 and and CC cord-191574-1g38scnj 12 27 we -PRON- PRP cord-191574-1g38scnj 12 28 find find VBP cord-191574-1g38scnj 12 29 that that IN cord-191574-1g38scnj 12 30 , , , cord-191574-1g38scnj 12 31 at at IN cord-191574-1g38scnj 12 32 least least JJS cord-191574-1g38scnj 12 33 for for IN cord-191574-1g38scnj 12 34 a a DT cord-191574-1g38scnj 12 35 specific specific JJ cord-191574-1g38scnj 12 36 range range NN cord-191574-1g38scnj 12 37 of of IN cord-191574-1g38scnj 12 38 parameters parameter NNS cord-191574-1g38scnj 12 39 , , , cord-191574-1g38scnj 12 40 there there EX cord-191574-1g38scnj 12 41 is be VBZ cord-191574-1g38scnj 12 42 a a DT cord-191574-1g38scnj 12 43 good good JJ cord-191574-1g38scnj 12 44 agreement agreement NN cord-191574-1g38scnj 12 45 between between IN cord-191574-1g38scnj 12 46 the the DT cord-191574-1g38scnj 12 47 Adomian Adomian NNP cord-191574-1g38scnj 12 48 and and CC cord-191574-1g38scnj 12 49 Laplace Laplace NNP cord-191574-1g38scnj 12 50 - - HYPH cord-191574-1g38scnj 12 51 Adomian adomian JJ cord-191574-1g38scnj 12 52 semianalytical semianalytical JJ cord-191574-1g38scnj 12 53 solutions solution NNS cord-191574-1g38scnj 12 54 , , , cord-191574-1g38scnj 12 55 containing contain VBG cord-191574-1g38scnj 12 56 only only RB cord-191574-1g38scnj 12 57 a a DT cord-191574-1g38scnj 12 58 small small JJ cord-191574-1g38scnj 12 59 number number NN cord-191574-1g38scnj 12 60 of of IN cord-191574-1g38scnj 12 61 terms term NNS cord-191574-1g38scnj 12 62 , , , cord-191574-1g38scnj 12 63 and and CC cord-191574-1g38scnj 12 64 the the DT cord-191574-1g38scnj 12 65 numerical numerical JJ cord-191574-1g38scnj 12 66 results result NNS cord-191574-1g38scnj 12 67 . . . cord-191574-1g38scnj 13 1 The the DT cord-191574-1g38scnj 13 2 study study NN cord-191574-1g38scnj 13 3 of of IN cord-191574-1g38scnj 13 4 the the DT cord-191574-1g38scnj 13 5 epidemic epidemic NN cord-191574-1g38scnj 13 6 mathematical mathematical JJ cord-191574-1g38scnj 13 7 models model NNS cord-191574-1g38scnj 13 8 in in IN cord-191574-1g38scnj 13 9 different different JJ cord-191574-1g38scnj 13 10 formal formal JJ cord-191574-1g38scnj 13 11 formulation formulation NN cord-191574-1g38scnj 13 12 has have VBZ cord-191574-1g38scnj 13 13 been be VBN cord-191574-1g38scnj 13 14 proved prove VBN cord-191574-1g38scnj 13 15 to to TO cord-191574-1g38scnj 13 16 be be VB cord-191574-1g38scnj 13 17 of of IN cord-191574-1g38scnj 13 18 crucial crucial JJ cord-191574-1g38scnj 13 19 interest interest NN cord-191574-1g38scnj 13 20 in in IN cord-191574-1g38scnj 13 21 the the DT cord-191574-1g38scnj 13 22 understanding understanding NN cord-191574-1g38scnj 13 23 of of IN cord-191574-1g38scnj 13 24 the the DT cord-191574-1g38scnj 13 25 dynamics dynamic NNS cord-191574-1g38scnj 13 26 , , , cord-191574-1g38scnj 13 27 spread spread VB cord-191574-1g38scnj 13 28 and and CC cord-191574-1g38scnj 13 29 control control NN cord-191574-1g38scnj 13 30 of of IN cord-191574-1g38scnj 13 31 epidemic epidemic NN cord-191574-1g38scnj 13 32 diseases disease NNS cord-191574-1g38scnj 13 33 [ [ -LRB- cord-191574-1g38scnj 13 34 1 1 CD cord-191574-1g38scnj 13 35 ] ] -RRB- cord-191574-1g38scnj 13 36 [ [ -LRB- cord-191574-1g38scnj 13 37 2 2 CD cord-191574-1g38scnj 13 38 ] ] -RRB- cord-191574-1g38scnj 13 39 [ [ -LRB- cord-191574-1g38scnj 13 40 3 3 CD cord-191574-1g38scnj 13 41 ] ] -RRB- cord-191574-1g38scnj 13 42 [ [ -LRB- cord-191574-1g38scnj 13 43 4 4 CD cord-191574-1g38scnj 13 44 ] ] -RRB- cord-191574-1g38scnj 13 45 [ [ -LRB- cord-191574-1g38scnj 13 46 5 5 CD cord-191574-1g38scnj 13 47 ] ] -RRB- cord-191574-1g38scnj 13 48 [ [ -LRB- cord-191574-1g38scnj 13 49 6 6 CD cord-191574-1g38scnj 13 50 ] ] -RRB- cord-191574-1g38scnj 13 51 . . . cord-191574-1g38scnj 14 1 The the DT cord-191574-1g38scnj 14 2 simplest simple JJS cord-191574-1g38scnj 14 3 of of IN cord-191574-1g38scnj 14 4 the the DT cord-191574-1g38scnj 14 5 epidemic epidemic NN cord-191574-1g38scnj 14 6 models model NNS cord-191574-1g38scnj 14 7 are be VBP cord-191574-1g38scnj 14 8 the the DT cord-191574-1g38scnj 14 9 so so RB cord-191574-1g38scnj 14 10 - - HYPH cord-191574-1g38scnj 14 11 called call VBN cord-191574-1g38scnj 14 12 deterministic deterministic JJ cord-191574-1g38scnj 14 13 compartmental compartmental JJ cord-191574-1g38scnj 14 14 models model NNS cord-191574-1g38scnj 14 15 , , , cord-191574-1g38scnj 14 16 consisting consist VBG cord-191574-1g38scnj 14 17 of of IN cord-191574-1g38scnj 14 18 at at RB cord-191574-1g38scnj 14 19 least least RBS cord-191574-1g38scnj 14 20 three three CD cord-191574-1g38scnj 14 21 compartments compartment NNS cord-191574-1g38scnj 14 22 : : : cord-191574-1g38scnj 14 23 given give VBN cord-191574-1g38scnj 14 24 by by IN cord-191574-1g38scnj 14 25 : : : cord-191574-1g38scnj 14 26 the the DT cord-191574-1g38scnj 14 27 number number NN cord-191574-1g38scnj 14 28 of of IN cord-191574-1g38scnj 14 29 susceptible susceptible JJ cord-191574-1g38scnj 14 30 individuals individual NNS cord-191574-1g38scnj 14 31 ( ( -LRB- cord-191574-1g38scnj 14 32 S S NNP cord-191574-1g38scnj 14 33 ) ) -RRB- cord-191574-1g38scnj 14 34 , , , cord-191574-1g38scnj 14 35 the the DT cord-191574-1g38scnj 14 36 number number NN cord-191574-1g38scnj 14 37 of of IN cord-191574-1g38scnj 14 38 infectious infectious JJ cord-191574-1g38scnj 14 39 individuals individual NNS cord-191574-1g38scnj 14 40 ( ( -LRB- cord-191574-1g38scnj 14 41 I i NN cord-191574-1g38scnj 14 42 ) ) -RRB- cord-191574-1g38scnj 14 43 , , , cord-191574-1g38scnj 14 44 and and CC cord-191574-1g38scnj 14 45 the the DT cord-191574-1g38scnj 14 46 number number NN cord-191574-1g38scnj 14 47 of of IN cord-191574-1g38scnj 14 48 removed remove VBN cord-191574-1g38scnj 14 49 ( ( -LRB- cord-191574-1g38scnj 14 50 and and CC cord-191574-1g38scnj 14 51 immune immune JJ cord-191574-1g38scnj 14 52 ) ) -RRB- cord-191574-1g38scnj 14 53 , , , cord-191574-1g38scnj 14 54 or or CC cord-191574-1g38scnj 14 55 deceased decease VBN cord-191574-1g38scnj 14 56 individuals individual NNS cord-191574-1g38scnj 14 57 ( ( -LRB- cord-191574-1g38scnj 14 58 R r NN cord-191574-1g38scnj 14 59 ) ) -RRB- cord-191574-1g38scnj 14 60 , , , cord-191574-1g38scnj 14 61 respectively respectively RB cord-191574-1g38scnj 14 62 . . . cord-191574-1g38scnj 15 1 The the DT cord-191574-1g38scnj 15 2 first first JJ cord-191574-1g38scnj 15 3 compartmental compartmental JJ cord-191574-1g38scnj 15 4 epidemiological epidemiological JJ cord-191574-1g38scnj 15 5 models model NNS cord-191574-1g38scnj 15 6 have have VBP cord-191574-1g38scnj 15 7 been be VBN cord-191574-1g38scnj 15 8 proposed propose VBN cord-191574-1g38scnj 15 9 and and CC cord-191574-1g38scnj 15 10 investigated investigate VBN cord-191574-1g38scnj 15 11 in in IN cord-191574-1g38scnj 15 12 [ [ -LRB- cord-191574-1g38scnj 15 13 7 7 CD cord-191574-1g38scnj 15 14 ] ] -RRB- cord-191574-1g38scnj 15 15 . . . cord-191574-1g38scnj 16 1 Despite despite IN cord-191574-1g38scnj 16 2 their -PRON- PRP$ cord-191574-1g38scnj 16 3 apparent apparent JJ cord-191574-1g38scnj 16 4 phenomenological phenomenological JJ cord-191574-1g38scnj 16 5 simplicity simplicity NN cord-191574-1g38scnj 16 6 , , , cord-191574-1g38scnj 16 7 the the DT cord-191574-1g38scnj 16 8 mathematical mathematical JJ cord-191574-1g38scnj 16 9 equations equation NNS cord-191574-1g38scnj 16 10 describing describe VBG cord-191574-1g38scnj 16 11 the the DT cord-191574-1g38scnj 16 12 SIR SIR NNP cord-191574-1g38scnj 16 13 type type NN cord-191574-1g38scnj 16 14 models model NNS cord-191574-1g38scnj 16 15 are be VBP cord-191574-1g38scnj 16 16 essentially essentially RB cord-191574-1g38scnj 16 17 nonlinear nonlinear JJ cord-191574-1g38scnj 16 18 , , , cord-191574-1g38scnj 16 19 with with IN cord-191574-1g38scnj 16 20 this this DT cord-191574-1g38scnj 16 21 nonlinearity nonlinearity NN cord-191574-1g38scnj 16 22 raising raise VBG cord-191574-1g38scnj 16 23 a a DT cord-191574-1g38scnj 16 24 number number NN cord-191574-1g38scnj 16 25 of of IN cord-191574-1g38scnj 16 26 important important JJ cord-191574-1g38scnj 16 27 and and CC cord-191574-1g38scnj 16 28 interesting interesting JJ cord-191574-1g38scnj 16 29 mathematical mathematical JJ cord-191574-1g38scnj 16 30 problems problem NNS cord-191574-1g38scnj 16 31 in in IN cord-191574-1g38scnj 16 32 the the DT cord-191574-1g38scnj 16 33 study study NN cord-191574-1g38scnj 16 34 of of IN cord-191574-1g38scnj 16 35 even even RB cord-191574-1g38scnj 16 36 the the DT cord-191574-1g38scnj 16 37 simplest simple JJS cord-191574-1g38scnj 16 38 models model NNS cord-191574-1g38scnj 16 39 of of IN cord-191574-1g38scnj 16 40 epidemics epidemic NNS cord-191574-1g38scnj 16 41 . . . cord-191574-1g38scnj 17 1 On on IN cord-191574-1g38scnj 17 2 the the DT cord-191574-1g38scnj 17 3 other other JJ cord-191574-1g38scnj 17 4 hand hand NN cord-191574-1g38scnj 17 5 the the DT cord-191574-1g38scnj 17 6 SIR SIR NNP cord-191574-1g38scnj 17 7 type type NN cord-191574-1g38scnj 17 8 models model NNS cord-191574-1g38scnj 17 9 still still RB cord-191574-1g38scnj 17 10 have have VBP cord-191574-1g38scnj 17 11 a a DT cord-191574-1g38scnj 17 12 powerful powerful JJ cord-191574-1g38scnj 17 13 predictive predictive NN cord-191574-1g38scnj 17 14 and and CC cord-191574-1g38scnj 17 15 investigating investigate VBG cord-191574-1g38scnj 17 16 power power NN cord-191574-1g38scnj 17 17 , , , cord-191574-1g38scnj 17 18 and and CC cord-191574-1g38scnj 17 19 many many JJ cord-191574-1g38scnj 17 20 of of IN cord-191574-1g38scnj 17 21 them -PRON- PRP cord-191574-1g38scnj 17 22 have have VBP cord-191574-1g38scnj 17 23 been be VBN cord-191574-1g38scnj 17 24 used use VBN cord-191574-1g38scnj 17 25 to to TO cord-191574-1g38scnj 17 26 investigate investigate VB cord-191574-1g38scnj 17 27 the the DT cord-191574-1g38scnj 17 28 recent recent JJ cord-191574-1g38scnj 17 29 COVID-19 COVID-19 NNP cord-191574-1g38scnj 17 30 pandemic pandemic NN cord-191574-1g38scnj 17 31 [ [ -LRB- cord-191574-1g38scnj 17 32 8 8 CD cord-191574-1g38scnj 17 33 ] ] -RRB- cord-191574-1g38scnj 17 34 , , , cord-191574-1g38scnj 17 35 like like UH cord-191574-1g38scnj 17 36 , , , cord-191574-1g38scnj 17 37 for for IN cord-191574-1g38scnj 17 38 example example NN cord-191574-1g38scnj 17 39 , , , cord-191574-1g38scnj 17 40 in in IN cord-191574-1g38scnj 17 41 [ [ -LRB- cord-191574-1g38scnj 17 42 9 9 CD cord-191574-1g38scnj 17 43 ] ] -RRB- cord-191574-1g38scnj 17 44 [ [ -LRB- cord-191574-1g38scnj 17 45 10 10 CD cord-191574-1g38scnj 17 46 ] ] -RRB- cord-191574-1g38scnj 18 1 [ [ -LRB- cord-191574-1g38scnj 18 2 11 11 CD cord-191574-1g38scnj 18 3 ] ] -RRB- cord-191574-1g38scnj 18 4 [ [ -LRB- cord-191574-1g38scnj 18 5 12 12 CD cord-191574-1g38scnj 18 6 ] ] -RRB- cord-191574-1g38scnj 18 7 [ [ -LRB- cord-191574-1g38scnj 18 8 13 13 CD cord-191574-1g38scnj 18 9 ] ] -RRB- cord-191574-1g38scnj 19 1 [ [ -LRB- cord-191574-1g38scnj 19 2 14 14 CD cord-191574-1g38scnj 19 3 ] ] -RRB- cord-191574-1g38scnj 20 1 [ [ -LRB- cord-191574-1g38scnj 20 2 15 15 CD cord-191574-1g38scnj 20 3 ] ] -RRB- cord-191574-1g38scnj 20 4 [ [ -LRB- cord-191574-1g38scnj 20 5 16 16 CD cord-191574-1g38scnj 20 6 ] ] -RRB- cord-191574-1g38scnj 20 7 [ [ -LRB- cord-191574-1g38scnj 20 8 17 17 CD cord-191574-1g38scnj 20 9 ] ] -RRB- cord-191574-1g38scnj 20 10 [ [ -LRB- cord-191574-1g38scnj 20 11 18 18 CD cord-191574-1g38scnj 20 12 ] ] -RRB- cord-191574-1g38scnj 20 13 [ [ -LRB- cord-191574-1g38scnj 20 14 19 19 CD cord-191574-1g38scnj 20 15 ] ] -RRB- cord-191574-1g38scnj 21 1 [ [ -LRB- cord-191574-1g38scnj 21 2 20 20 CD cord-191574-1g38scnj 21 3 ] ] -RRB- cord-191574-1g38scnj 21 4 [ [ -LRB- cord-191574-1g38scnj 21 5 21 21 CD cord-191574-1g38scnj 21 6 ] ] -RRB- cord-191574-1g38scnj 22 1 [ [ -LRB- cord-191574-1g38scnj 22 2 22 22 CD cord-191574-1g38scnj 22 3 ] ] -RRB- cord-191574-1g38scnj 22 4 [ [ -LRB- cord-191574-1g38scnj 22 5 23 23 CD cord-191574-1g38scnj 22 6 ] ] -RRB- cord-191574-1g38scnj 23 1 [ [ -LRB- cord-191574-1g38scnj 23 2 24 24 CD cord-191574-1g38scnj 23 3 ] ] -RRB- cord-191574-1g38scnj 23 4 . . . cord-191574-1g38scnj 24 1 The the DT cord-191574-1g38scnj 24 2 basic basic JJ cord-191574-1g38scnj 24 3 equations equation NNS cord-191574-1g38scnj 24 4 of of IN cord-191574-1g38scnj 24 5 the the DT cord-191574-1g38scnj 24 6 SIR SIR NNP cord-191574-1g38scnj 24 7 model model NN cord-191574-1g38scnj 24 8 are be VBP cord-191574-1g38scnj 24 9 given give VBN cord-191574-1g38scnj 24 10 by by IN cord-191574-1g38scnj 24 11 the the DT cord-191574-1g38scnj 24 12 following follow VBG cord-191574-1g38scnj 24 13 nonlinear nonlinear JJ cord-191574-1g38scnj 24 14 system system NN cord-191574-1g38scnj 24 15 of of IN cord-191574-1g38scnj 24 16 ordinary ordinary JJ cord-191574-1g38scnj 24 17 differential differential JJ cord-191574-1g38scnj 24 18 equations equation NNS cord-191574-1g38scnj 24 19 [ [ -LRB- cord-191574-1g38scnj 24 20 7 7 CD cord-191574-1g38scnj 24 21 , , , cord-191574-1g38scnj 24 22 25 25 CD cord-191574-1g38scnj 24 23 ] ] -RRB- cord-191574-1g38scnj 24 24 _SP cord-191574-1g38scnj 24 25 respectively respectively RB cord-191574-1g38scnj 24 26 , , , cord-191574-1g38scnj 24 27 where where WRB cord-191574-1g38scnj 24 28 x(t x(t NNP cord-191574-1g38scnj 24 29 ) ) -RRB- cord-191574-1g38scnj 24 30 > > XX cord-191574-1g38scnj 24 31 0 0 NFP cord-191574-1g38scnj 24 32 , , , cord-191574-1g38scnj 24 33 y(t y(t NN cord-191574-1g38scnj 24 34 ) ) -RRB- cord-191574-1g38scnj 24 35 > > NFP cord-191574-1g38scnj 24 36 0 0 NFP cord-191574-1g38scnj 24 37 and and CC cord-191574-1g38scnj 24 38 z(t z(t CD cord-191574-1g38scnj 24 39 ) ) -RRB- cord-191574-1g38scnj 24 40 > > XX cord-191574-1g38scnj 24 41 0 0 NFP cord-191574-1g38scnj 24 42 , , , cord-191574-1g38scnj 24 43 ∀t ∀t NNP cord-191574-1g38scnj 24 44 ≥ ≥ CD cord-191574-1g38scnj 24 45 0 0 NNP cord-191574-1g38scnj 24 46 . . . cord-191574-1g38scnj 25 1 The the DT cord-191574-1g38scnj 25 2 system system NN cord-191574-1g38scnj 25 3 of of IN cord-191574-1g38scnj 25 4 equations equation NNS cord-191574-1g38scnj 25 5 ( ( -LRB- cord-191574-1g38scnj 25 6 1 1 CD cord-191574-1g38scnj 25 7 ) ) -RRB- cord-191574-1g38scnj 25 8 must must MD cord-191574-1g38scnj 25 9 be be VB cord-191574-1g38scnj 25 10 integrated integrate VBN cord-191574-1g38scnj 25 11 with with IN cord-191574-1g38scnj 25 12 the the DT cord-191574-1g38scnj 25 13 initial initial JJ cord-191574-1g38scnj 25 14 conditions condition NNS cord-191574-1g38scnj 25 15 x x , cord-191574-1g38scnj 25 16 ( ( -LRB- cord-191574-1g38scnj 25 17 0 0 NFP cord-191574-1g38scnj 25 18 ) ) -RRB- cord-191574-1g38scnj 26 1 = = NFP cord-191574-1g38scnj 27 1 N n NN cord-191574-1g38scnj 27 2 1 1 CD cord-191574-1g38scnj 27 3 ≥ ≥ CD cord-191574-1g38scnj 27 4 0 0 CD cord-191574-1g38scnj 27 5 , , , cord-191574-1g38scnj 27 6 y y NNP cord-191574-1g38scnj 27 7 ( ( -LRB- cord-191574-1g38scnj 27 8 0 0 NFP cord-191574-1g38scnj 27 9 ) ) -RRB- cord-191574-1g38scnj 27 10 = = NFP cord-191574-1g38scnj 28 1 N n CD cord-191574-1g38scnj 28 2 2 2 CD cord-191574-1g38scnj 28 3 ≥ ≥ CD cord-191574-1g38scnj 28 4 0 0 CD cord-191574-1g38scnj 28 5 and and CC cord-191574-1g38scnj 28 6 z z NNP cord-191574-1g38scnj 28 7 ( ( -LRB- cord-191574-1g38scnj 28 8 0 0 NFP cord-191574-1g38scnj 28 9 ) ) -RRB- cord-191574-1g38scnj 28 10 = = NFP cord-191574-1g38scnj 29 1 N n NN cord-191574-1g38scnj 29 2 3 3 CD cord-191574-1g38scnj 29 3 ≥ ≥ CD cord-191574-1g38scnj 29 4 0 0 CD cord-191574-1g38scnj 29 5 , , , cord-191574-1g38scnj 29 6 respectively respectively RB cord-191574-1g38scnj 29 7 , , , cord-191574-1g38scnj 29 8 where where WRB cord-191574-1g38scnj 29 9 N n NN cord-191574-1g38scnj 29 10 i i PRP cord-191574-1g38scnj 29 11 ∈ ∈ VBP cord-191574-1g38scnj 29 12 ℜ ℜ NNP cord-191574-1g38scnj 29 13 , , , cord-191574-1g38scnj 29 14 i i PRP cord-191574-1g38scnj 29 15 = = SYM cord-191574-1g38scnj 29 16 1 1 CD cord-191574-1g38scnj 29 17 , , , cord-191574-1g38scnj 29 18 2 2 CD cord-191574-1g38scnj 29 19 , , , cord-191574-1g38scnj 29 20 3 3 CD cord-191574-1g38scnj 29 21 . . . cord-191574-1g38scnj 30 1 The the DT cord-191574-1g38scnj 30 2 time time NN cord-191574-1g38scnj 30 3 evolution evolution NN cord-191574-1g38scnj 30 4 of of IN cord-191574-1g38scnj 30 5 the the DT cord-191574-1g38scnj 30 6 SIR SIR NNP cord-191574-1g38scnj 30 7 epidemic epidemic NN cord-191574-1g38scnj 30 8 model model NN cord-191574-1g38scnj 30 9 , , , cord-191574-1g38scnj 30 10 as as RB cord-191574-1g38scnj 30 11 well well RB cord-191574-1g38scnj 30 12 as as IN cord-191574-1g38scnj 30 13 its -PRON- PRP$ cord-191574-1g38scnj 30 14 intrinsic intrinsic JJ cord-191574-1g38scnj 30 15 dynamics dynamic NNS cord-191574-1g38scnj 30 16 is be VBZ cord-191574-1g38scnj 30 17 determined determine VBN cord-191574-1g38scnj 30 18 by by IN cord-191574-1g38scnj 30 19 two two CD cord-191574-1g38scnj 30 20 epidemiological epidemiological JJ cord-191574-1g38scnj 30 21 parameters parameter NNS cord-191574-1g38scnj 30 22 only only RB cord-191574-1g38scnj 30 23 , , , cord-191574-1g38scnj 30 24 the the DT cord-191574-1g38scnj 30 25 infection infection NN cord-191574-1g38scnj 30 26 rate rate NN cord-191574-1g38scnj 30 27 β β NN cord-191574-1g38scnj 30 28 , , , cord-191574-1g38scnj 30 29 and and CC cord-191574-1g38scnj 30 30 the the DT cord-191574-1g38scnj 30 31 mean mean JJ cord-191574-1g38scnj 30 32 recovery recovery NN cord-191574-1g38scnj 30 33 rate rate NN cord-191574-1g38scnj 30 34 γ γ NN cord-191574-1g38scnj 30 35 , , , cord-191574-1g38scnj 30 36 respectively respectively RB cord-191574-1g38scnj 30 37 , , , cord-191574-1g38scnj 30 38 which which WDT cord-191574-1g38scnj 30 39 are be VBP cord-191574-1g38scnj 30 40 assumed assume VBN cord-191574-1g38scnj 30 41 to to TO cord-191574-1g38scnj 30 42 be be VB cord-191574-1g38scnj 30 43 positive positive JJ cord-191574-1g38scnj 30 44 constants constant NNS cord-191574-1g38scnj 30 45 . . . cord-191574-1g38scnj 31 1 The the DT cord-191574-1g38scnj 31 2 exact exact JJ cord-191574-1g38scnj 31 3 solution solution NN cord-191574-1g38scnj 31 4 of of IN cord-191574-1g38scnj 31 5 the the DT cord-191574-1g38scnj 31 6 SIR SIR NNP cord-191574-1g38scnj 31 7 model model NN cord-191574-1g38scnj 31 8 ( ( -LRB- cord-191574-1g38scnj 31 9 1 1 CD cord-191574-1g38scnj 31 10 ) ) -RRB- cord-191574-1g38scnj 31 11 can can MD cord-191574-1g38scnj 31 12 be be VB cord-191574-1g38scnj 31 13 obtained obtain VBN cord-191574-1g38scnj 31 14 in in IN cord-191574-1g38scnj 31 15 an an DT cord-191574-1g38scnj 31 16 exact exact JJ cord-191574-1g38scnj 31 17 parametric parametric JJ cord-191574-1g38scnj 31 18 form form NN cord-191574-1g38scnj 31 19 , , , cord-191574-1g38scnj 31 20 and and CC cord-191574-1g38scnj 31 21 it -PRON- PRP cord-191574-1g38scnj 31 22 is be VBZ cord-191574-1g38scnj 31 23 given give VBN cord-191574-1g38scnj 31 24 by by IN cord-191574-1g38scnj 31 25 [ [ -LRB- cord-191574-1g38scnj 31 26 25 25 CD cord-191574-1g38scnj 31 27 ] ] -RRB- cord-191574-1g38scnj 32 1 x x LS cord-191574-1g38scnj 32 2 = = NFP cord-191574-1g38scnj 33 1 x x LS cord-191574-1g38scnj 33 2 0 0 CD cord-191574-1g38scnj 33 3 u u NN cord-191574-1g38scnj 33 4 , , , cord-191574-1g38scnj 34 1 where where WRB cord-191574-1g38scnj 34 2 N N NNP cord-191574-1g38scnj 34 3 = = SYM cord-191574-1g38scnj 34 4 ∑ ∑ NNP cord-191574-1g38scnj 34 5 3 3 CD cord-191574-1g38scnj 34 6 i=1 i=1 JJ cord-191574-1g38scnj 34 7 N n CD cord-191574-1g38scnj 35 1 i i PRP cord-191574-1g38scnj 35 2 , , , cord-191574-1g38scnj 35 3 x x NN cord-191574-1g38scnj 35 4 0 0 CD cord-191574-1g38scnj 35 5 = = SYM cord-191574-1g38scnj 35 6 N n NN cord-191574-1g38scnj 35 7 1 1 CD cord-191574-1g38scnj 35 8 e e NN cord-191574-1g38scnj 35 9 ( ( -LRB- cord-191574-1g38scnj 35 10 β β NN cord-191574-1g38scnj 35 11 /γ /γ NNP cord-191574-1g38scnj 35 12 ) ) -RRB- cord-191574-1g38scnj 35 13 N n CD cord-191574-1g38scnj 35 14 3 3 CD cord-191574-1g38scnj 35 15 , , , cord-191574-1g38scnj 36 1 and and CC cord-191574-1g38scnj 36 2 u u NNP cord-191574-1g38scnj 36 3 is be VBZ cord-191574-1g38scnj 36 4 a a DT cord-191574-1g38scnj 36 5 parameter parameter NN cord-191574-1g38scnj 36 6 . . . cord-191574-1g38scnj 37 1 In in IN cord-191574-1g38scnj 37 2 these these DT cord-191574-1g38scnj 37 3 equations equation NNS cord-191574-1g38scnj 37 4 x(t x(t VBD cord-191574-1g38scnj 37 5 ) ) -RRB- cord-191574-1g38scnj 37 6 gives give VBZ cord-191574-1g38scnj 37 7 the the DT cord-191574-1g38scnj 37 8 number number NN cord-191574-1g38scnj 37 9 of of IN cord-191574-1g38scnj 37 10 individuals individual NNS cord-191574-1g38scnj 37 11 not not RB cord-191574-1g38scnj 37 12 yet yet RB cord-191574-1g38scnj 37 13 infected infect VBN cord-191574-1g38scnj 37 14 with with IN cord-191574-1g38scnj 37 15 the the DT cord-191574-1g38scnj 37 16 epidemics epidemic NNS cord-191574-1g38scnj 37 17 at at IN cord-191574-1g38scnj 37 18 time time NN cord-191574-1g38scnj 37 19 t t NN cord-191574-1g38scnj 37 20 , , , cord-191574-1g38scnj 37 21 or or CC cord-191574-1g38scnj 37 22 those those DT cord-191574-1g38scnj 37 23 susceptible susceptible JJ cord-191574-1g38scnj 37 24 to to IN cord-191574-1g38scnj 37 25 the the DT cord-191574-1g38scnj 37 26 infection infection NN cord-191574-1g38scnj 37 27 , , , cord-191574-1g38scnj 37 28 y(t y(t NN cord-191574-1g38scnj 37 29 ) ) -RRB- cord-191574-1g38scnj 38 1 represents represent VBZ cord-191574-1g38scnj 38 2 the the DT cord-191574-1g38scnj 38 3 number number NN cord-191574-1g38scnj 38 4 of of IN cord-191574-1g38scnj 38 5 individuals individual NNS cord-191574-1g38scnj 38 6 who who WP cord-191574-1g38scnj 38 7 have have VBP cord-191574-1g38scnj 38 8 already already RB cord-191574-1g38scnj 38 9 been be VBN cord-191574-1g38scnj 38 10 infected infect VBN cord-191574-1g38scnj 38 11 with with IN cord-191574-1g38scnj 38 12 the the DT cord-191574-1g38scnj 38 13 disease disease NN cord-191574-1g38scnj 38 14 , , , cord-191574-1g38scnj 38 15 and and CC cord-191574-1g38scnj 38 16 hence hence RB cord-191574-1g38scnj 38 17 are be VBP cord-191574-1g38scnj 38 18 able able JJ cord-191574-1g38scnj 38 19 to to TO cord-191574-1g38scnj 38 20 spread spread VB cord-191574-1g38scnj 38 21 the the DT cord-191574-1g38scnj 38 22 disease disease NN cord-191574-1g38scnj 38 23 to to IN cord-191574-1g38scnj 38 24 the the DT cord-191574-1g38scnj 38 25 persons person NNS cord-191574-1g38scnj 38 26 in in IN cord-191574-1g38scnj 38 27 the the DT cord-191574-1g38scnj 38 28 susceptible susceptible JJ cord-191574-1g38scnj 38 29 category category NN cord-191574-1g38scnj 38 30 , , , cord-191574-1g38scnj 38 31 while while IN cord-191574-1g38scnj 38 32 z(t z(t CD cord-191574-1g38scnj 38 33 ) ) -RRB- cord-191574-1g38scnj 38 34 denotes denote VBZ cord-191574-1g38scnj 38 35 the the DT cord-191574-1g38scnj 38 36 individuals individual NNS cord-191574-1g38scnj 38 37 who who WP cord-191574-1g38scnj 38 38 have have VBP cord-191574-1g38scnj 38 39 been be VBN cord-191574-1g38scnj 38 40 infected infect VBN cord-191574-1g38scnj 38 41 , , , cord-191574-1g38scnj 38 42 but but CC cord-191574-1g38scnj 38 43 did do VBD cord-191574-1g38scnj 38 44 recover recover VB cord-191574-1g38scnj 38 45 from from IN cord-191574-1g38scnj 38 46 the the DT cord-191574-1g38scnj 38 47 disease disease NN cord-191574-1g38scnj 38 48 . . . cord-191574-1g38scnj 39 1 For for IN cord-191574-1g38scnj 39 2 a a DT cord-191574-1g38scnj 39 3 pedagogical pedagogical JJ cord-191574-1g38scnj 39 4 discussion discussion NN cord-191574-1g38scnj 39 5 of of IN cord-191574-1g38scnj 39 6 the the DT cord-191574-1g38scnj 39 7 SIR SIR NNP cord-191574-1g38scnj 39 8 model model NN cord-191574-1g38scnj 39 9 and and CC cord-191574-1g38scnj 39 10 of of IN cord-191574-1g38scnj 39 11 its -PRON- PRP$ cord-191574-1g38scnj 39 12 exact exact JJ cord-191574-1g38scnj 39 13 solution solution NN cord-191574-1g38scnj 39 14 see see VBP cord-191574-1g38scnj 39 15 [ [ -LRB- cord-191574-1g38scnj 39 16 26 26 CD cord-191574-1g38scnj 39 17 ] ] -RRB- cord-191574-1g38scnj 39 18 . . . cord-191574-1g38scnj 40 1 However however RB cord-191574-1g38scnj 40 2 , , , cord-191574-1g38scnj 40 3 due due IN cord-191574-1g38scnj 40 4 to to IN cord-191574-1g38scnj 40 5 the the DT cord-191574-1g38scnj 40 6 integral integral JJ cord-191574-1g38scnj 40 7 representation representation NN cord-191574-1g38scnj 40 8 of of IN cord-191574-1g38scnj 40 9 the the DT cord-191574-1g38scnj 40 10 time time NN cord-191574-1g38scnj 40 11 variable variable NN cord-191574-1g38scnj 40 12 , , , cord-191574-1g38scnj 40 13 some some DT cord-191574-1g38scnj 40 14 alternative alternative JJ cord-191574-1g38scnj 40 15 representations representation NNS cord-191574-1g38scnj 40 16 and and CC cord-191574-1g38scnj 40 17 methods method NNS cord-191574-1g38scnj 40 18 have have VBP cord-191574-1g38scnj 40 19 been be VBN cord-191574-1g38scnj 40 20 used use VBN cord-191574-1g38scnj 40 21 for for IN cord-191574-1g38scnj 40 22 the the DT cord-191574-1g38scnj 40 23 study study NN cord-191574-1g38scnj 40 24 of of IN cord-191574-1g38scnj 40 25 the the DT cord-191574-1g38scnj 40 26 solution solution NN cord-191574-1g38scnj 40 27 of of IN cord-191574-1g38scnj 40 28 the the DT cord-191574-1g38scnj 40 29 SIR SIR NNP cord-191574-1g38scnj 40 30 model model NN cord-191574-1g38scnj 40 31 [ [ -LRB- cord-191574-1g38scnj 40 32 27 27 CD cord-191574-1g38scnj 40 33 ] ] -RRB- cord-191574-1g38scnj 40 34 [ [ -LRB- cord-191574-1g38scnj 40 35 28 28 CD cord-191574-1g38scnj 40 36 ] ] -RRB- cord-191574-1g38scnj 40 37 [ [ -LRB- cord-191574-1g38scnj 40 38 29 29 CD cord-191574-1g38scnj 40 39 ] ] -RRB- cord-191574-1g38scnj 40 40 , , , cord-191574-1g38scnj 40 41 including include VBG cord-191574-1g38scnj 40 42 the the DT cord-191574-1g38scnj 40 43 variational variational JJ cord-191574-1g38scnj 40 44 iteration iteration NN cord-191574-1g38scnj 40 45 method method NN cord-191574-1g38scnj 40 46 , , , cord-191574-1g38scnj 40 47 and and CC cord-191574-1g38scnj 40 48 the the DT cord-191574-1g38scnj 40 49 homotopy homotopy JJ cord-191574-1g38scnj 40 50 perturbation perturbation NN cord-191574-1g38scnj 40 51 method method NN cord-191574-1g38scnj 40 52 . . . cord-191574-1g38scnj 41 1 A a DT cord-191574-1g38scnj 41 2 powerful powerful JJ cord-191574-1g38scnj 41 3 method method NN cord-191574-1g38scnj 41 4 for for IN cord-191574-1g38scnj 41 5 obtaining obtain VBG cord-191574-1g38scnj 41 6 semianalytical semianalytical JJ cord-191574-1g38scnj 41 7 solutions solution NNS cord-191574-1g38scnj 41 8 of of IN cord-191574-1g38scnj 41 9 strongly strongly RB cord-191574-1g38scnj 41 10 nonlinear nonlinear JJ cord-191574-1g38scnj 41 11 differential differential JJ cord-191574-1g38scnj 41 12 equations equation NNS cord-191574-1g38scnj 41 13 is be VBZ cord-191574-1g38scnj 41 14 represented represent VBN cord-191574-1g38scnj 41 15 by by IN cord-191574-1g38scnj 41 16 the the DT cord-191574-1g38scnj 41 17 Adomian adomian JJ cord-191574-1g38scnj 41 18 Decomposition Decomposition NNP cord-191574-1g38scnj 41 19 Method Method NNP cord-191574-1g38scnj 41 20 [ [ -LRB- cord-191574-1g38scnj 41 21 30 30 CD cord-191574-1g38scnj 41 22 ] ] -RRB- cord-191574-1g38scnj 41 23 [ [ -LRB- cord-191574-1g38scnj 41 24 31 31 CD cord-191574-1g38scnj 41 25 ] ] -RRB- cord-191574-1g38scnj 42 1 [ [ -LRB- cord-191574-1g38scnj 42 2 32 32 CD cord-191574-1g38scnj 42 3 ] ] -RRB- cord-191574-1g38scnj 42 4 [ [ -LRB- cord-191574-1g38scnj 42 5 33 33 CD cord-191574-1g38scnj 42 6 ] ] -RRB- cord-191574-1g38scnj 42 7 , , , cord-191574-1g38scnj 42 8 whose whose WP$ cord-191574-1g38scnj 42 9 basic basic JJ cord-191574-1g38scnj 42 10 idea idea NN cord-191574-1g38scnj 42 11 is be VBZ cord-191574-1g38scnj 42 12 to to TO cord-191574-1g38scnj 42 13 decompose decompose VB cord-191574-1g38scnj 42 14 the the DT cord-191574-1g38scnj 42 15 nonlinear nonlinear JJ cord-191574-1g38scnj 42 16 terms term NNS cord-191574-1g38scnj 42 17 appearing appear VBG cord-191574-1g38scnj 42 18 in in IN cord-191574-1g38scnj 42 19 a a DT cord-191574-1g38scnj 42 20 differential differential JJ cord-191574-1g38scnj 42 21 equation equation NN cord-191574-1g38scnj 42 22 in in IN cord-191574-1g38scnj 42 23 terms term NNS cord-191574-1g38scnj 42 24 of of IN cord-191574-1g38scnj 42 25 the the DT cord-191574-1g38scnj 42 26 Adomian adomian JJ cord-191574-1g38scnj 42 27 polynomials polynomial NNS cord-191574-1g38scnj 42 28 , , , cord-191574-1g38scnj 42 29 which which WDT cord-191574-1g38scnj 42 30 are be VBP cord-191574-1g38scnj 42 31 constructed construct VBN cord-191574-1g38scnj 42 32 recursively recursively RB cord-191574-1g38scnj 42 33 . . . cord-191574-1g38scnj 43 1 The the DT cord-191574-1g38scnj 43 2 Adomian adomian JJ cord-191574-1g38scnj 43 3 Decomposition Decomposition NNP cord-191574-1g38scnj 43 4 Method Method NNP cord-191574-1g38scnj 43 5 , , , cord-191574-1g38scnj 43 6 as as RB cord-191574-1g38scnj 43 7 well well RB cord-191574-1g38scnj 43 8 as as IN cord-191574-1g38scnj 43 9 its -PRON- PRP$ cord-191574-1g38scnj 43 10 very very RB cord-191574-1g38scnj 43 11 effective effective JJ cord-191574-1g38scnj 43 12 version version NN cord-191574-1g38scnj 43 13 , , , cord-191574-1g38scnj 43 14 the the DT cord-191574-1g38scnj 43 15 Laplace Laplace NNP cord-191574-1g38scnj 43 16 - - HYPH cord-191574-1g38scnj 43 17 Adomian Adomian NNP cord-191574-1g38scnj 43 18 Decomposition Decomposition NNP cord-191574-1g38scnj 43 19 Method Method NNP cord-191574-1g38scnj 43 20 , , , cord-191574-1g38scnj 43 21 has have VBZ cord-191574-1g38scnj 43 22 been be VBN cord-191574-1g38scnj 43 23 extensively extensively RB cord-191574-1g38scnj 43 24 used use VBN cord-191574-1g38scnj 43 25 to to TO cord-191574-1g38scnj 43 26 study study VB cord-191574-1g38scnj 43 27 the the DT cord-191574-1g38scnj 43 28 approximate approximate JJ cord-191574-1g38scnj 43 29 semianalytical semianalytical JJ cord-191574-1g38scnj 43 30 solutions solution NNS cord-191574-1g38scnj 43 31 of of IN cord-191574-1g38scnj 43 32 different different JJ cord-191574-1g38scnj 43 33 types type NNS cord-191574-1g38scnj 43 34 of of IN cord-191574-1g38scnj 43 35 differential differential JJ cord-191574-1g38scnj 43 36 equations equation NNS cord-191574-1g38scnj 43 37 , , , cord-191574-1g38scnj 43 38 and and CC cord-191574-1g38scnj 43 39 physical physical JJ cord-191574-1g38scnj 43 40 models model NNS cord-191574-1g38scnj 43 41 [ [ -LRB- cord-191574-1g38scnj 43 42 34 34 CD cord-191574-1g38scnj 43 43 ] ] -RRB- cord-191574-1g38scnj 43 44 [ [ -LRB- cord-191574-1g38scnj 43 45 35 35 CD cord-191574-1g38scnj 43 46 ] ] -RRB- cord-191574-1g38scnj 43 47 [ [ -LRB- cord-191574-1g38scnj 43 48 36 36 CD cord-191574-1g38scnj 43 49 ] ] -RRB- cord-191574-1g38scnj 43 50 [ [ -LRB- cord-191574-1g38scnj 43 51 37 37 CD cord-191574-1g38scnj 43 52 ] ] -RRB- cord-191574-1g38scnj 43 53 [ [ -LRB- cord-191574-1g38scnj 43 54 38 38 CD cord-191574-1g38scnj 43 55 ] ] -RRB- cord-191574-1g38scnj 43 56 [ [ -LRB- cord-191574-1g38scnj 43 57 39 39 CD cord-191574-1g38scnj 43 58 ] ] -RRB- cord-191574-1g38scnj 43 59 . . . cord-191574-1g38scnj 44 1 The the DT cord-191574-1g38scnj 44 2 Adomian adomian JJ cord-191574-1g38scnj 44 3 Decomposition Decomposition NNP cord-191574-1g38scnj 44 4 Method Method NNP cord-191574-1g38scnj 44 5 was be VBD cord-191574-1g38scnj 44 6 used use VBN cord-191574-1g38scnj 44 7 for for IN cord-191574-1g38scnj 44 8 the the DT cord-191574-1g38scnj 44 9 study study NN cord-191574-1g38scnj 44 10 of of IN cord-191574-1g38scnj 44 11 the the DT cord-191574-1g38scnj 44 12 SIR SIR NNP cord-191574-1g38scnj 44 13 model model NN cord-191574-1g38scnj 44 14 in in IN cord-191574-1g38scnj 44 15 [ [ -LRB- cord-191574-1g38scnj 44 16 40 40 CD cord-191574-1g38scnj 44 17 ] ] -RRB- cord-191574-1g38scnj 44 18 , , , cord-191574-1g38scnj 44 19 while while IN cord-191574-1g38scnj 44 20 a a DT cord-191574-1g38scnj 44 21 series series NN cord-191574-1g38scnj 44 22 solution solution NN cord-191574-1g38scnj 44 23 of of IN cord-191574-1g38scnj 44 24 the the DT cord-191574-1g38scnj 44 25 SIR SIR NNP cord-191574-1g38scnj 44 26 model model NN cord-191574-1g38scnj 44 27 by by IN cord-191574-1g38scnj 44 28 using use VBG cord-191574-1g38scnj 44 29 the the DT cord-191574-1g38scnj 44 30 Laplace Laplace NNP cord-191574-1g38scnj 44 31 - - HYPH cord-191574-1g38scnj 44 32 Adomian Adomian NNP cord-191574-1g38scnj 44 33 Decomposition Decomposition NNP cord-191574-1g38scnj 44 34 Method Method NNP cord-191574-1g38scnj 44 35 was be VBD cord-191574-1g38scnj 44 36 obtained obtain VBN cord-191574-1g38scnj 44 37 in in IN cord-191574-1g38scnj 44 38 [ [ -LRB- cord-191574-1g38scnj 44 39 41 41 CD cord-191574-1g38scnj 44 40 ] ] -RRB- cord-191574-1g38scnj 44 41 , , , cord-191574-1g38scnj 44 42 where where WRB cord-191574-1g38scnj 44 43 the the DT cord-191574-1g38scnj 44 44 solutions solution NNS cord-191574-1g38scnj 44 45 have have VBP cord-191574-1g38scnj 44 46 been be VBN cord-191574-1g38scnj 44 47 expressed express VBN cord-191574-1g38scnj 44 48 in in IN cord-191574-1g38scnj 44 49 the the DT cord-191574-1g38scnj 44 50 form form NN cord-191574-1g38scnj 44 51 of of IN cord-191574-1g38scnj 44 52 infinite infinite JJ cord-191574-1g38scnj 44 53 series series NN cord-191574-1g38scnj 44 54 . . . cord-191574-1g38scnj 45 1 The the DT cord-191574-1g38scnj 45 2 series series NN cord-191574-1g38scnj 45 3 representations representation NNS cord-191574-1g38scnj 45 4 of of IN cord-191574-1g38scnj 45 5 the the DT cord-191574-1g38scnj 45 6 time time NN cord-191574-1g38scnj 45 7 evolution evolution NN cord-191574-1g38scnj 45 8 of of IN cord-191574-1g38scnj 45 9 the the DT cord-191574-1g38scnj 45 10 SIR SIR NNP cord-191574-1g38scnj 45 11 compartments compartment NNS cord-191574-1g38scnj 45 12 obtained obtain VBN cord-191574-1g38scnj 45 13 in in IN cord-191574-1g38scnj 45 14 [ [ -LRB- cord-191574-1g38scnj 45 15 41 41 CD cord-191574-1g38scnj 45 16 ] ] -RRB- cord-191574-1g38scnj 45 17 have have VBP cord-191574-1g38scnj 45 18 been be VBN cord-191574-1g38scnj 45 19 compared compare VBN cord-191574-1g38scnj 45 20 with with IN cord-191574-1g38scnj 45 21 the the DT cord-191574-1g38scnj 45 22 exact exact JJ cord-191574-1g38scnj 45 23 numerical numerical JJ cord-191574-1g38scnj 45 24 solutions solution NNS cord-191574-1g38scnj 45 25 of of IN cord-191574-1g38scnj 45 26 the the DT cord-191574-1g38scnj 45 27 model model NN cord-191574-1g38scnj 45 28 , , , cord-191574-1g38scnj 45 29 and and CC cord-191574-1g38scnj 45 30 , , , cord-191574-1g38scnj 45 31 for for IN cord-191574-1g38scnj 45 32 a a DT cord-191574-1g38scnj 45 33 specific specific JJ cord-191574-1g38scnj 45 34 range range NN cord-191574-1g38scnj 45 35 of of IN cord-191574-1g38scnj 45 36 the the DT cord-191574-1g38scnj 45 37 model model NN cord-191574-1g38scnj 45 38 parameters parameter NNS cord-191574-1g38scnj 45 39 , , , cord-191574-1g38scnj 45 40 a a DT cord-191574-1g38scnj 45 41 good good JJ cord-191574-1g38scnj 45 42 agreement agreement NN cord-191574-1g38scnj 45 43 between between IN cord-191574-1g38scnj 45 44 the the DT cord-191574-1g38scnj 45 45 Laplace Laplace NNP cord-191574-1g38scnj 45 46 - - HYPH cord-191574-1g38scnj 45 47 Adomian adomian JJ cord-191574-1g38scnj 45 48 semianalytical semianalytical JJ cord-191574-1g38scnj 45 49 solutions solution NNS cord-191574-1g38scnj 45 50 , , , cord-191574-1g38scnj 45 51 containing contain VBG cord-191574-1g38scnj 45 52 only only RB cord-191574-1g38scnj 45 53 three three CD cord-191574-1g38scnj 45 54 terms term NNS cord-191574-1g38scnj 45 55 , , , cord-191574-1g38scnj 45 56 and and CC cord-191574-1g38scnj 45 57 the the DT cord-191574-1g38scnj 45 58 numerical numerical JJ cord-191574-1g38scnj 45 59 results result NNS cord-191574-1g38scnj 45 60 , , , cord-191574-1g38scnj 45 61 was be VBD cord-191574-1g38scnj 45 62 obtained obtain VBN cord-191574-1g38scnj 45 63 . . . cord-191574-1g38scnj 46 1 One one CD cord-191574-1g38scnj 46 2 of of IN cord-191574-1g38scnj 46 3 the the DT cord-191574-1g38scnj 46 4 simplest simple JJS cord-191574-1g38scnj 46 5 generalizations generalization NNS cord-191574-1g38scnj 46 6 of of IN cord-191574-1g38scnj 46 7 the the DT cord-191574-1g38scnj 46 8 SIR SIR NNP cord-191574-1g38scnj 46 9 model model NN cord-191574-1g38scnj 46 10 is be VBZ cord-191574-1g38scnj 46 11 given give VBN cord-191574-1g38scnj 46 12 by by IN cord-191574-1g38scnj 46 13 the the DT cord-191574-1g38scnj 46 14 SIR SIR NNP cord-191574-1g38scnj 46 15 model model NN cord-191574-1g38scnj 46 16 with with IN cord-191574-1g38scnj 46 17 vital vital JJ cord-191574-1g38scnj 46 18 dynamics dynamic NNS cord-191574-1g38scnj 46 19 [ [ -LRB- cord-191574-1g38scnj 46 20 1 1 CD cord-191574-1g38scnj 46 21 , , , cord-191574-1g38scnj 46 22 2 2 CD cord-191574-1g38scnj 46 23 , , , cord-191574-1g38scnj 46 24 4 4 CD cord-191574-1g38scnj 46 25 , , , cord-191574-1g38scnj 46 26 6 6 CD cord-191574-1g38scnj 46 27 ] ] -RRB- cord-191574-1g38scnj 46 28 , , , cord-191574-1g38scnj 46 29 in in IN cord-191574-1g38scnj 46 30 which which WDT cord-191574-1g38scnj 46 31 the the DT cord-191574-1g38scnj 46 32 number number NN cord-191574-1g38scnj 46 33 of of IN cord-191574-1g38scnj 46 34 deaths death NNS cord-191574-1g38scnj 46 35 and and CC cord-191574-1g38scnj 46 36 births birth NNS cord-191574-1g38scnj 46 37 is be VBZ cord-191574-1g38scnj 46 38 included include VBN cord-191574-1g38scnj 46 39 in in IN cord-191574-1g38scnj 46 40 the the DT cord-191574-1g38scnj 46 41 model model NN cord-191574-1g38scnj 46 42 via via IN cord-191574-1g38scnj 46 43 a a DT cord-191574-1g38scnj 46 44 new new JJ cord-191574-1g38scnj 46 45 constant constant JJ cord-191574-1g38scnj 46 46 µ. µ. NN cord-191574-1g38scnj 47 1 Usually usually RB cord-191574-1g38scnj 47 2 it -PRON- PRP cord-191574-1g38scnj 47 3 is be VBZ cord-191574-1g38scnj 47 4 assumed assume VBN cord-191574-1g38scnj 47 5 that that IN cord-191574-1g38scnj 47 6 the the DT cord-191574-1g38scnj 47 7 death death NN cord-191574-1g38scnj 47 8 rate rate NN cord-191574-1g38scnj 47 9 is be VBZ cord-191574-1g38scnj 47 10 equal equal JJ cord-191574-1g38scnj 47 11 to to IN cord-191574-1g38scnj 47 12 the the DT cord-191574-1g38scnj 47 13 birth birth NN cord-191574-1g38scnj 47 14 rate rate NN cord-191574-1g38scnj 47 15 . . . cord-191574-1g38scnj 48 1 Even even RB cord-191574-1g38scnj 48 2 if if IN cord-191574-1g38scnj 48 3 the the DT cord-191574-1g38scnj 48 4 mathematical mathematical JJ cord-191574-1g38scnj 48 5 modifications modification NNS cord-191574-1g38scnj 48 6 of of IN cord-191574-1g38scnj 48 7 the the DT cord-191574-1g38scnj 48 8 initial initial JJ cord-191574-1g38scnj 48 9 SIR SIR NNP cord-191574-1g38scnj 48 10 model model NN cord-191574-1g38scnj 48 11 with with IN cord-191574-1g38scnj 48 12 µ µ NN cord-191574-1g38scnj 48 13 = = SYM cord-191574-1g38scnj 48 14 0 0 CD cord-191574-1g38scnj 48 15 look look VB cord-191574-1g38scnj 48 16 , , , cord-191574-1g38scnj 48 17 at at IN cord-191574-1g38scnj 48 18 first first JJ cord-191574-1g38scnj 48 19 sight sight NN cord-191574-1g38scnj 48 20 , , , cord-191574-1g38scnj 48 21 minimal minimal JJ cord-191574-1g38scnj 48 22 , , , cord-191574-1g38scnj 48 23 the the DT cord-191574-1g38scnj 48 24 SIR SIR NNP cord-191574-1g38scnj 48 25 model model NN cord-191574-1g38scnj 48 26 with with IN cord-191574-1g38scnj 48 27 vital vital JJ cord-191574-1g38scnj 48 28 dynamics dynamic NNS cord-191574-1g38scnj 48 29 has have VBZ cord-191574-1g38scnj 48 30 very very RB cord-191574-1g38scnj 48 31 important important JJ cord-191574-1g38scnj 48 32 differences difference NNS cord-191574-1g38scnj 48 33 as as IN cord-191574-1g38scnj 48 34 compared compare VBN cord-191574-1g38scnj 48 35 to to IN cord-191574-1g38scnj 48 36 the the DT cord-191574-1g38scnj 48 37 SIR SIR NNP cord-191574-1g38scnj 48 38 model model NN cord-191574-1g38scnj 48 39 ( ( -LRB- cord-191574-1g38scnj 48 40 1 1 CD cord-191574-1g38scnj 48 41 ) ) -RRB- cord-191574-1g38scnj 48 42 . . . cord-191574-1g38scnj 49 1 The the DT cord-191574-1g38scnj 49 2 SIR SIR NNP cord-191574-1g38scnj 49 3 model model NN cord-191574-1g38scnj 49 4 without without IN cord-191574-1g38scnj 49 5 vital vital JJ cord-191574-1g38scnj 49 6 dynamics dynamic NNS cord-191574-1g38scnj 49 7 with with IN cord-191574-1g38scnj 49 8 µ µ NN cord-191574-1g38scnj 49 9 = = SYM cord-191574-1g38scnj 49 10 0 0 NFP cord-191574-1g38scnj 49 11 , , , cord-191574-1g38scnj 49 12 has have VBZ cord-191574-1g38scnj 49 13 a a DT cord-191574-1g38scnj 49 14 first first JJ cord-191574-1g38scnj 49 15 integral integral JJ cord-191574-1g38scnj 49 16 N n NN cord-191574-1g38scnj 49 17 = = NN cord-191574-1g38scnj 49 18 S s NN cord-191574-1g38scnj 50 1 + + CC cord-191574-1g38scnj 51 1 I -PRON- PRP cord-191574-1g38scnj 51 2 + + CC cord-191574-1g38scnj 51 3 R r NN cord-191574-1g38scnj 51 4 , , , cord-191574-1g38scnj 51 5 which which WDT cord-191574-1g38scnj 51 6 is be VBZ cord-191574-1g38scnj 51 7 the the DT cord-191574-1g38scnj 51 8 total total JJ cord-191574-1g38scnj 51 9 number number NN cord-191574-1g38scnj 51 10 of of IN cord-191574-1g38scnj 51 11 individuals individual NNS cord-191574-1g38scnj 51 12 in in IN cord-191574-1g38scnj 51 13 the the DT cord-191574-1g38scnj 51 14 given give VBN cord-191574-1g38scnj 51 15 population population NN cord-191574-1g38scnj 51 16 . . . cord-191574-1g38scnj 52 1 Moreover moreover RB cord-191574-1g38scnj 52 2 , , , cord-191574-1g38scnj 52 3 it -PRON- PRP cord-191574-1g38scnj 52 4 also also RB cord-191574-1g38scnj 52 5 has have VBZ cord-191574-1g38scnj 52 6 a a DT cord-191574-1g38scnj 52 7 second second JJ cord-191574-1g38scnj 52 8 first first JJ cord-191574-1g38scnj 52 9 integral integral JJ cord-191574-1g38scnj 52 10 G(S G(S NNP cord-191574-1g38scnj 52 11 , , , cord-191574-1g38scnj 52 12 I -PRON- PRP cord-191574-1g38scnj 52 13 , , , cord-191574-1g38scnj 52 14 R r NN cord-191574-1g38scnj 52 15 ) ) -RRB- cord-191574-1g38scnj 52 16 = = NFP cord-191574-1g38scnj 53 1 β β NNP cord-191574-1g38scnj 53 2 R r NN cord-191574-1g38scnj 53 3 + + CC cord-191574-1g38scnj 53 4 γ γ NN cord-191574-1g38scnj 53 5 ln ln NN cord-191574-1g38scnj 53 6 S S NNP cord-191574-1g38scnj 53 7 [ [ -LRB- cord-191574-1g38scnj 53 8 42 42 CD cord-191574-1g38scnj 53 9 ] ] -RRB- cord-191574-1g38scnj 53 10 . . . cord-191574-1g38scnj 54 1 Hence hence RB cord-191574-1g38scnj 54 2 the the DT cord-191574-1g38scnj 54 3 SIR SIR NNP cord-191574-1g38scnj 54 4 system system NN cord-191574-1g38scnj 54 5 with with IN cord-191574-1g38scnj 54 6 µ µ NN cord-191574-1g38scnj 54 7 = = SYM cord-191574-1g38scnj 54 8 0 0 NFP cord-191574-1g38scnj 54 9 is be VBZ cord-191574-1g38scnj 54 10 a a DT cord-191574-1g38scnj 54 11 completely completely RB cord-191574-1g38scnj 54 12 integrable integrable JJ cord-191574-1g38scnj 54 13 system system NN cord-191574-1g38scnj 54 14 with with IN cord-191574-1g38scnj 54 15 two two CD cord-191574-1g38scnj 54 16 functionally functionally RB cord-191574-1g38scnj 54 17 independent independent JJ cord-191574-1g38scnj 54 18 first first JJ cord-191574-1g38scnj 54 19 integrals integral NNS cord-191574-1g38scnj 54 20 . . . cord-191574-1g38scnj 55 1 On on IN cord-191574-1g38scnj 55 2 the the DT cord-191574-1g38scnj 55 3 other other JJ cord-191574-1g38scnj 55 4 hand hand NN cord-191574-1g38scnj 55 5 in in IN cord-191574-1g38scnj 55 6 the the DT cord-191574-1g38scnj 55 7 case case NN cord-191574-1g38scnj 55 8 of of IN cord-191574-1g38scnj 55 9 µ µ NN cord-191574-1g38scnj 55 10 = = SYM cord-191574-1g38scnj 55 11 0 0 CD cord-191574-1g38scnj 55 12 , , , cord-191574-1g38scnj 55 13 in in IN cord-191574-1g38scnj 55 14 [ [ -LRB- cord-191574-1g38scnj 55 15 42 42 CD cord-191574-1g38scnj 55 16 ] ] -RRB- cord-191574-1g38scnj 55 17 it -PRON- PRP cord-191574-1g38scnj 55 18 was be VBD cord-191574-1g38scnj 55 19 proved prove VBN cord-191574-1g38scnj 55 20 that that IN cord-191574-1g38scnj 55 21 the the DT cord-191574-1g38scnj 55 22 SIR SIR NNP cord-191574-1g38scnj 55 23 model model NN cord-191574-1g38scnj 55 24 has have VBZ cord-191574-1g38scnj 55 25 no no DT cord-191574-1g38scnj 55 26 polynomial polynomial JJ cord-191574-1g38scnj 55 27 or or CC cord-191574-1g38scnj 55 28 proper proper JJ cord-191574-1g38scnj 55 29 rational rational JJ cord-191574-1g38scnj 55 30 first first JJ cord-191574-1g38scnj 55 31 integrals integral NNS cord-191574-1g38scnj 55 32 . . . cord-191574-1g38scnj 56 1 This this DT cord-191574-1g38scnj 56 2 result result NN cord-191574-1g38scnj 56 3 is be VBZ cord-191574-1g38scnj 56 4 obtained obtain VBN cord-191574-1g38scnj 56 5 by by IN cord-191574-1g38scnj 56 6 studying study VBG cord-191574-1g38scnj 56 7 the the DT cord-191574-1g38scnj 56 8 invariant invariant JJ cord-191574-1g38scnj 56 9 algebraic algebraic JJ cord-191574-1g38scnj 56 10 surfaces surface NNS cord-191574-1g38scnj 56 11 . . . cord-191574-1g38scnj 57 1 Moreover moreover RB cord-191574-1g38scnj 57 2 , , , cord-191574-1g38scnj 57 3 although although IN cord-191574-1g38scnj 57 4 the the DT cord-191574-1g38scnj 57 5 SIR SIR NNP cord-191574-1g38scnj 57 6 model model NN cord-191574-1g38scnj 57 7 with with IN cord-191574-1g38scnj 57 8 µ µ NN cord-191574-1g38scnj 57 9 = = SYM cord-191574-1g38scnj 57 10 0 0 NFP cord-191574-1g38scnj 57 11 is be VBZ cord-191574-1g38scnj 57 12 not not RB cord-191574-1g38scnj 57 13 integrable integrable JJ cord-191574-1g38scnj 57 14 , , , cord-191574-1g38scnj 57 15 and and CC cord-191574-1g38scnj 57 16 hence hence RB cord-191574-1g38scnj 57 17 it -PRON- PRP cord-191574-1g38scnj 57 18 does do VBZ cord-191574-1g38scnj 57 19 not not RB cord-191574-1g38scnj 57 20 have have VB cord-191574-1g38scnj 57 21 an an DT cord-191574-1g38scnj 57 22 exact exact JJ cord-191574-1g38scnj 57 23 solution solution NN cord-191574-1g38scnj 57 24 , , , cord-191574-1g38scnj 57 25 the the DT cord-191574-1g38scnj 57 26 global global JJ cord-191574-1g38scnj 57 27 dynamics dynamic NNS cord-191574-1g38scnj 57 28 of of IN cord-191574-1g38scnj 57 29 the the DT cord-191574-1g38scnj 57 30 SIR SIR NNP cord-191574-1g38scnj 57 31 model model NN cord-191574-1g38scnj 57 32 with with IN cord-191574-1g38scnj 57 33 vital vital JJ cord-191574-1g38scnj 57 34 dynamics dynamic NNS cord-191574-1g38scnj 57 35 can can MD cord-191574-1g38scnj 57 36 be be VB cord-191574-1g38scnj 57 37 studied study VBN cord-191574-1g38scnj 57 38 based base VBN cord-191574-1g38scnj 57 39 on on IN cord-191574-1g38scnj 57 40 the the DT cord-191574-1g38scnj 57 41 existence existence NN cord-191574-1g38scnj 57 42 of of IN cord-191574-1g38scnj 57 43 an an DT cord-191574-1g38scnj 57 44 invariant invariant JJ cord-191574-1g38scnj 57 45 algebraic algebraic JJ cord-191574-1g38scnj 57 46 surface surface NN cord-191574-1g38scnj 57 47 . . . cord-191574-1g38scnj 58 1 In in IN cord-191574-1g38scnj 58 2 [ [ -LRB- cord-191574-1g38scnj 58 3 25 25 CD cord-191574-1g38scnj 58 4 ] ] -RRB- cord-191574-1g38scnj 58 5 it -PRON- PRP cord-191574-1g38scnj 58 6 was be VBD cord-191574-1g38scnj 58 7 shown show VBN cord-191574-1g38scnj 58 8 that that IN cord-191574-1g38scnj 58 9 the the DT cord-191574-1g38scnj 58 10 generalization generalization NN cord-191574-1g38scnj 58 11 of of IN cord-191574-1g38scnj 58 12 the the DT cord-191574-1g38scnj 58 13 SIR SIR NNP cord-191574-1g38scnj 58 14 model model NN cord-191574-1g38scnj 58 15 with with IN cord-191574-1g38scnj 58 16 µ µ NN cord-191574-1g38scnj 58 17 = = SYM cord-191574-1g38scnj 58 18 0 0 CD cord-191574-1g38scnj 58 19 , , , cord-191574-1g38scnj 58 20 including include VBG cord-191574-1g38scnj 58 21 births birth NNS cord-191574-1g38scnj 58 22 and and CC cord-191574-1g38scnj 58 23 deaths death NNS cord-191574-1g38scnj 58 24 , , , cord-191574-1g38scnj 58 25 and and CC cord-191574-1g38scnj 58 26 described describe VBN cord-191574-1g38scnj 58 27 by by IN cord-191574-1g38scnj 58 28 a a DT cord-191574-1g38scnj 58 29 nonlinear nonlinear JJ cord-191574-1g38scnj 58 30 system system NN cord-191574-1g38scnj 58 31 of of IN cord-191574-1g38scnj 58 32 differential differential JJ cord-191574-1g38scnj 58 33 equations equation NNS cord-191574-1g38scnj 58 34 , , , cord-191574-1g38scnj 58 35 can can MD cord-191574-1g38scnj 58 36 be be VB cord-191574-1g38scnj 58 37 reduced reduce VBN cord-191574-1g38scnj 58 38 to to IN cord-191574-1g38scnj 58 39 an an DT cord-191574-1g38scnj 58 40 Abel Abel NNP cord-191574-1g38scnj 58 41 type type NN cord-191574-1g38scnj 58 42 equation equation NN cord-191574-1g38scnj 58 43 . . . cord-191574-1g38scnj 59 1 The the DT cord-191574-1g38scnj 59 2 reduction reduction NN cord-191574-1g38scnj 59 3 of of IN cord-191574-1g38scnj 59 4 the the DT cord-191574-1g38scnj 59 5 SIR SIR NNP cord-191574-1g38scnj 59 6 model model NN cord-191574-1g38scnj 59 7 with with IN cord-191574-1g38scnj 59 8 vital vital JJ cord-191574-1g38scnj 59 9 dynamics dynamic NNS cord-191574-1g38scnj 59 10 to to IN cord-191574-1g38scnj 59 11 an an DT cord-191574-1g38scnj 59 12 Abel Abel NNP cord-191574-1g38scnj 59 13 type type NN cord-191574-1g38scnj 59 14 first first JJ cord-191574-1g38scnj 59 15 order order NN cord-191574-1g38scnj 59 16 differential differential NN cord-191574-1g38scnj 59 17 equation equation NN cord-191574-1g38scnj 59 18 greatly greatly RB cord-191574-1g38scnj 59 19 simplifies simplify VBZ cord-191574-1g38scnj 59 20 the the DT cord-191574-1g38scnj 59 21 analysis analysis NN cord-191574-1g38scnj 59 22 of of IN cord-191574-1g38scnj 59 23 its -PRON- PRP$ cord-191574-1g38scnj 59 24 properties property NNS cord-191574-1g38scnj 59 25 . . . cord-191574-1g38scnj 60 1 An an DT cord-191574-1g38scnj 60 2 approximate approximate JJ cord-191574-1g38scnj 60 3 solution solution NN cord-191574-1g38scnj 60 4 of of IN cord-191574-1g38scnj 60 5 the the DT cord-191574-1g38scnj 60 6 Abel Abel NNP cord-191574-1g38scnj 60 7 equation equation NN cord-191574-1g38scnj 60 8 was be VBD cord-191574-1g38scnj 60 9 obtained obtain VBN cord-191574-1g38scnj 60 10 by by IN cord-191574-1g38scnj 60 11 using use VBG cord-191574-1g38scnj 60 12 a a DT cord-191574-1g38scnj 60 13 perturbative perturbative JJ cord-191574-1g38scnj 60 14 approach approach NN cord-191574-1g38scnj 60 15 , , , cord-191574-1g38scnj 60 16 in in IN cord-191574-1g38scnj 60 17 a a DT cord-191574-1g38scnj 60 18 power power NN cord-191574-1g38scnj 60 19 series series NN cord-191574-1g38scnj 60 20 form form NN cord-191574-1g38scnj 60 21 . . . cord-191574-1g38scnj 61 1 Moreover moreover RB cord-191574-1g38scnj 61 2 , , , cord-191574-1g38scnj 61 3 the the DT cord-191574-1g38scnj 61 4 general general JJ cord-191574-1g38scnj 61 5 solution solution NN cord-191574-1g38scnj 61 6 of of IN cord-191574-1g38scnj 61 7 the the DT cord-191574-1g38scnj 61 8 SIR SIR NNP cord-191574-1g38scnj 61 9 model model NN cord-191574-1g38scnj 61 10 with with IN cord-191574-1g38scnj 61 11 vital vital JJ cord-191574-1g38scnj 61 12 dynamics dynamic NNS cord-191574-1g38scnj 61 13 can can MD cord-191574-1g38scnj 61 14 be be VB cord-191574-1g38scnj 61 15 represented represent VBN cord-191574-1g38scnj 61 16 in in IN cord-191574-1g38scnj 61 17 an an DT cord-191574-1g38scnj 61 18 exact exact JJ cord-191574-1g38scnj 61 19 parametric parametric JJ cord-191574-1g38scnj 61 20 form form NN cord-191574-1g38scnj 61 21 . . . cord-191574-1g38scnj 62 1 In in IN cord-191574-1g38scnj 62 2 the the DT cord-191574-1g38scnj 62 3 present present JJ cord-191574-1g38scnj 62 4 work work NN cord-191574-1g38scnj 62 5 we -PRON- PRP cord-191574-1g38scnj 62 6 consider consider VBP cord-191574-1g38scnj 62 7 the the DT cord-191574-1g38scnj 62 8 possibility possibility NN cord-191574-1g38scnj 62 9 of of IN cord-191574-1g38scnj 62 10 obtaining obtain VBG cord-191574-1g38scnj 62 11 some some DT cord-191574-1g38scnj 62 12 accurate accurate JJ cord-191574-1g38scnj 62 13 semianalytical semianalytical JJ cord-191574-1g38scnj 62 14 solutions solution NNS cord-191574-1g38scnj 62 15 of of IN cord-191574-1g38scnj 62 16 the the DT cord-191574-1g38scnj 62 17 equations equation NNS cord-191574-1g38scnj 62 18 of of IN cord-191574-1g38scnj 62 19 the the DT cord-191574-1g38scnj 62 20 SIR SIR NNP cord-191574-1g38scnj 62 21 model model NN cord-191574-1g38scnj 62 22 with with IN cord-191574-1g38scnj 62 23 vital vital JJ cord-191574-1g38scnj 62 24 dynamics dynamic NNS cord-191574-1g38scnj 62 25 by by IN cord-191574-1g38scnj 62 26 using use VBG cord-191574-1g38scnj 62 27 the the DT cord-191574-1g38scnj 62 28 Adomian Adomian NNP cord-191574-1g38scnj 62 29 and and CC cord-191574-1g38scnj 62 30 the the DT cord-191574-1g38scnj 62 31 Laplace Laplace NNP cord-191574-1g38scnj 62 32 - - HYPH cord-191574-1g38scnj 62 33 Adomian Adomian NNP cord-191574-1g38scnj 62 34 Decomposition decomposition NN cord-191574-1g38scnj 62 35 Methods Methods NNPS cord-191574-1g38scnj 62 36 , , , cord-191574-1g38scnj 62 37 respectively respectively RB cord-191574-1g38scnj 62 38 . . . cord-191574-1g38scnj 63 1 As as IN cord-191574-1g38scnj 63 2 a a DT cord-191574-1g38scnj 63 3 first first JJ cord-191574-1g38scnj 63 4 step step NN cord-191574-1g38scnj 63 5 in in IN cord-191574-1g38scnj 63 6 our -PRON- PRP$ cord-191574-1g38scnj 63 7 analysis analysis NN cord-191574-1g38scnj 63 8 we -PRON- PRP cord-191574-1g38scnj 63 9 reduce reduce VBP cord-191574-1g38scnj 63 10 the the DT cord-191574-1g38scnj 63 11 SIR SIR NNP cord-191574-1g38scnj 63 12 model model NN cord-191574-1g38scnj 63 13 with with IN cord-191574-1g38scnj 63 14 µ µ NN cord-191574-1g38scnj 63 15 = = SYM cord-191574-1g38scnj 63 16 0 0 CD cord-191574-1g38scnj 63 17 to to IN cord-191574-1g38scnj 63 18 a a DT cord-191574-1g38scnj 63 19 basic basic JJ cord-191574-1g38scnj 63 20 second second JJ cord-191574-1g38scnj 63 21 order order NN cord-191574-1g38scnj 63 22 differential differential NN cord-191574-1g38scnj 63 23 equation equation NN cord-191574-1g38scnj 63 24 , , , cord-191574-1g38scnj 63 25 describing describe VBG cord-191574-1g38scnj 63 26 the the DT cord-191574-1g38scnj 63 27 evolution evolution NN cord-191574-1g38scnj 63 28 of of IN cord-191574-1g38scnj 63 29 the the DT cord-191574-1g38scnj 63 30 individuals individual NNS cord-191574-1g38scnj 63 31 infected infect VBN cord-191574-1g38scnj 63 32 with with IN cord-191574-1g38scnj 63 33 the the DT cord-191574-1g38scnj 63 34 disease disease NN cord-191574-1g38scnj 63 35 . . . cord-191574-1g38scnj 64 1 Then then RB cord-191574-1g38scnj 64 2 , , , cord-191574-1g38scnj 64 3 once once IN cord-191574-1g38scnj 64 4 the the DT cord-191574-1g38scnj 64 5 solution solution NN cord-191574-1g38scnj 64 6 of of IN cord-191574-1g38scnj 64 7 the the DT cord-191574-1g38scnj 64 8 basic basic JJ cord-191574-1g38scnj 64 9 equation equation NN cord-191574-1g38scnj 64 10 is be VBZ cord-191574-1g38scnj 64 11 known know VBN cord-191574-1g38scnj 64 12 , , , cord-191574-1g38scnj 64 13 the the DT cord-191574-1g38scnj 64 14 general general JJ cord-191574-1g38scnj 64 15 solution solution NN cord-191574-1g38scnj 64 16 of of IN cord-191574-1g38scnj 64 17 the the DT cord-191574-1g38scnj 64 18 SIR SIR NNP cord-191574-1g38scnj 64 19 model model NN cord-191574-1g38scnj 64 20 with with IN cord-191574-1g38scnj 64 21 vital vital JJ cord-191574-1g38scnj 64 22 dynamics dynamic NNS cord-191574-1g38scnj 64 23 can can MD cord-191574-1g38scnj 64 24 be be VB cord-191574-1g38scnj 64 25 obtained obtain VBN cord-191574-1g38scnj 64 26 in in IN cord-191574-1g38scnj 64 27 terms term NNS cord-191574-1g38scnj 64 28 of of IN cord-191574-1g38scnj 64 29 the the DT cord-191574-1g38scnj 64 30 variable variable NN cord-191574-1g38scnj 64 31 u u NN cord-191574-1g38scnj 64 32 related relate VBD cord-191574-1g38scnj 64 33 to to IN cord-191574-1g38scnj 64 34 the the DT cord-191574-1g38scnj 64 35 number number NN cord-191574-1g38scnj 64 36 y y NN cord-191574-1g38scnj 64 37 of of IN cord-191574-1g38scnj 64 38 the the DT cord-191574-1g38scnj 64 39 infected infected JJ cord-191574-1g38scnj 64 40 individuals individual NNS cord-191574-1g38scnj 64 41 . . . cord-191574-1g38scnj 65 1 In in IN cord-191574-1g38scnj 65 2 order order NN cord-191574-1g38scnj 65 3 to to TO cord-191574-1g38scnj 65 4 obtain obtain VB cord-191574-1g38scnj 65 5 some some DT cord-191574-1g38scnj 65 6 approximate approximate JJ cord-191574-1g38scnj 65 7 solutions solution NNS cord-191574-1g38scnj 65 8 of of IN cord-191574-1g38scnj 65 9 the the DT cord-191574-1g38scnj 65 10 basic basic JJ cord-191574-1g38scnj 65 11 evolution evolution NN cord-191574-1g38scnj 65 12 equation equation NN cord-191574-1g38scnj 65 13 we -PRON- PRP cord-191574-1g38scnj 65 14 will will MD cord-191574-1g38scnj 65 15 apply apply VB cord-191574-1g38scnj 65 16 to to IN cord-191574-1g38scnj 65 17 it -PRON- PRP cord-191574-1g38scnj 65 18 both both CC cord-191574-1g38scnj 65 19 the the DT cord-191574-1g38scnj 65 20 Adomian Adomian NNP cord-191574-1g38scnj 65 21 and and CC cord-191574-1g38scnj 65 22 the the DT cord-191574-1g38scnj 65 23 Laplace Laplace NNP cord-191574-1g38scnj 65 24 - - HYPH cord-191574-1g38scnj 65 25 Adomian Adomian NNP cord-191574-1g38scnj 65 26 Decomposition decomposition NN cord-191574-1g38scnj 65 27 Methods Methods NNPS cord-191574-1g38scnj 65 28 , , , cord-191574-1g38scnj 65 29 We -PRON- PRP cord-191574-1g38scnj 65 30 obtain obtain VBP cord-191574-1g38scnj 65 31 in in IN cord-191574-1g38scnj 65 32 each each DT cord-191574-1g38scnj 65 33 case case NN cord-191574-1g38scnj 65 34 the the DT cord-191574-1g38scnj 65 35 recurrence recurrence NN cord-191574-1g38scnj 65 36 relations relation NNS cord-191574-1g38scnj 65 37 giving give VBG cord-191574-1g38scnj 65 38 the the DT cord-191574-1g38scnj 65 39 successive successive JJ cord-191574-1g38scnj 65 40 terms term NNS cord-191574-1g38scnj 65 41 in in IN cord-191574-1g38scnj 65 42 the the DT cord-191574-1g38scnj 65 43 Adomian adomian JJ cord-191574-1g38scnj 65 44 series series NN cord-191574-1g38scnj 65 45 representation representation NN cord-191574-1g38scnj 65 46 as as IN cord-191574-1g38scnj 65 47 a a DT cord-191574-1g38scnj 65 48 function function NN cord-191574-1g38scnj 65 49 of of IN cord-191574-1g38scnj 65 50 the the DT cord-191574-1g38scnj 65 51 Adomian adomian JJ cord-191574-1g38scnj 65 52 polynomials polynomial NNS cord-191574-1g38scnj 65 53 . . . cord-191574-1g38scnj 66 1 In in IN cord-191574-1g38scnj 66 2 the the DT cord-191574-1g38scnj 66 3 case case NN cord-191574-1g38scnj 66 4 of of IN cord-191574-1g38scnj 66 5 the the DT cord-191574-1g38scnj 66 6 Adomian adomian JJ cord-191574-1g38scnj 66 7 Decomposition Decomposition NNP cord-191574-1g38scnj 66 8 Method Method NNP cord-191574-1g38scnj 66 9 the the DT cord-191574-1g38scnj 66 10 iterative iterative JJ cord-191574-1g38scnj 66 11 solution solution NN cord-191574-1g38scnj 66 12 can can MD cord-191574-1g38scnj 66 13 be be VB cord-191574-1g38scnj 66 14 evaluated evaluate VBN cord-191574-1g38scnj 66 15 exactly exactly RB cord-191574-1g38scnj 66 16 only only RB cord-191574-1g38scnj 66 17 for for IN cord-191574-1g38scnj 66 18 the the DT cord-191574-1g38scnj 66 19 first first JJ cord-191574-1g38scnj 66 20 two two CD cord-191574-1g38scnj 66 21 terms term NNS cord-191574-1g38scnj 66 22 of of IN cord-191574-1g38scnj 66 23 the the DT cord-191574-1g38scnj 66 24 series series NN cord-191574-1g38scnj 66 25 expansion expansion NN cord-191574-1g38scnj 66 26 , , , cord-191574-1g38scnj 66 27 while while IN cord-191574-1g38scnj 66 28 for for IN cord-191574-1g38scnj 66 29 the the DT cord-191574-1g38scnj 66 30 Laplace Laplace NNP cord-191574-1g38scnj 66 31 - - HYPH cord-191574-1g38scnj 66 32 Adomian Adomian NNP cord-191574-1g38scnj 66 33 Decomposition Decomposition NNP cord-191574-1g38scnj 66 34 Method Method NNP cord-191574-1g38scnj 66 35 all all PDT cord-191574-1g38scnj 66 36 the the DT cord-191574-1g38scnj 66 37 terms term NNS cord-191574-1g38scnj 66 38 in in IN cord-191574-1g38scnj 66 39 the the DT cord-191574-1g38scnj 66 40 series series NN cord-191574-1g38scnj 66 41 expansion expansion NN cord-191574-1g38scnj 66 42 can can MD cord-191574-1g38scnj 66 43 be be VB cord-191574-1g38scnj 66 44 obtained obtain VBN cord-191574-1g38scnj 66 45 exactly exactly RB cord-191574-1g38scnj 66 46 . . . cord-191574-1g38scnj 67 1 We -PRON- PRP cord-191574-1g38scnj 67 2 also also RB cord-191574-1g38scnj 67 3 perform perform VBP cord-191574-1g38scnj 67 4 a a DT cord-191574-1g38scnj 67 5 careful careful JJ cord-191574-1g38scnj 67 6 comparison comparison NN cord-191574-1g38scnj 67 7 of of IN cord-191574-1g38scnj 67 8 the the DT cord-191574-1g38scnj 67 9 semianalytical semianalytical JJ cord-191574-1g38scnj 67 10 results result NNS cord-191574-1g38scnj 67 11 with with IN cord-191574-1g38scnj 67 12 the the DT cord-191574-1g38scnj 67 13 exact exact JJ cord-191574-1g38scnj 67 14 numerical numerical JJ cord-191574-1g38scnj 67 15 solutions solution NNS cord-191574-1g38scnj 67 16 , , , cord-191574-1g38scnj 67 17 and and CC cord-191574-1g38scnj 67 18 it -PRON- PRP cord-191574-1g38scnj 67 19 turns turn VBZ cord-191574-1g38scnj 67 20 out out RP cord-191574-1g38scnj 67 21 that that IN cord-191574-1g38scnj 67 22 for for IN cord-191574-1g38scnj 67 23 certain certain JJ cord-191574-1g38scnj 67 24 ranges range NNS cord-191574-1g38scnj 67 25 of of IN cord-191574-1g38scnj 67 26 the the DT cord-191574-1g38scnj 67 27 model model NN cord-191574-1g38scnj 67 28 parameters parameter VBZ cord-191574-1g38scnj 67 29 β β NNP cord-191574-1g38scnj 67 30 , , , cord-191574-1g38scnj 67 31 γ γ NN cord-191574-1g38scnj 67 32 , , , cord-191574-1g38scnj 67 33 µ µ LS cord-191574-1g38scnj 67 34 ) ) -RRB- cord-191574-1g38scnj 67 35 both both CC cord-191574-1g38scnj 67 36 the the DT cord-191574-1g38scnj 67 37 Adomian Adomian NNP cord-191574-1g38scnj 67 38 and and CC cord-191574-1g38scnj 67 39 the the DT cord-191574-1g38scnj 67 40 Laplace Laplace NNP cord-191574-1g38scnj 67 41 - - HYPH cord-191574-1g38scnj 67 42 Adomian Adomian NNP cord-191574-1g38scnj 67 43 Decomposition decomposition NN cord-191574-1g38scnj 67 44 Methods Methods NNPS cord-191574-1g38scnj 67 45 can can MD cord-191574-1g38scnj 67 46 give give VB cord-191574-1g38scnj 67 47 a a DT cord-191574-1g38scnj 67 48 good good JJ cord-191574-1g38scnj 67 49 description description NN cord-191574-1g38scnj 67 50 of of IN cord-191574-1g38scnj 67 51 the the DT cord-191574-1g38scnj 67 52 numerical numerical JJ cord-191574-1g38scnj 67 53 results result NNS cord-191574-1g38scnj 67 54 . . . cord-191574-1g38scnj 68 1 The the DT cord-191574-1g38scnj 68 2 present present JJ cord-191574-1g38scnj 68 3 paper paper NN cord-191574-1g38scnj 68 4 is be VBZ cord-191574-1g38scnj 68 5 organized organize VBN cord-191574-1g38scnj 68 6 as as IN cord-191574-1g38scnj 68 7 follows follow NNS cord-191574-1g38scnj 68 8 . . . cord-191574-1g38scnj 69 1 The the DT cord-191574-1g38scnj 69 2 basic basic JJ cord-191574-1g38scnj 69 3 equation equation NN cord-191574-1g38scnj 69 4 describing describe VBG cord-191574-1g38scnj 69 5 the the DT cord-191574-1g38scnj 69 6 dynamical dynamical JJ cord-191574-1g38scnj 69 7 evolution evolution NN cord-191574-1g38scnj 69 8 of of IN cord-191574-1g38scnj 69 9 the the DT cord-191574-1g38scnj 69 10 SIR SIR NNP cord-191574-1g38scnj 69 11 model model NN cord-191574-1g38scnj 69 12 with with IN cord-191574-1g38scnj 69 13 vital vital JJ cord-191574-1g38scnj 69 14 dynamics dynamic NNS cord-191574-1g38scnj 69 15 is be VBZ cord-191574-1g38scnj 69 16 obtained obtain VBN cord-191574-1g38scnj 69 17 in in IN cord-191574-1g38scnj 69 18 Section Section NNP cord-191574-1g38scnj 69 19 II II NNP cord-191574-1g38scnj 69 20 . . . cord-191574-1g38scnj 70 1 The the DT cord-191574-1g38scnj 70 2 semianalytical semianalytical JJ cord-191574-1g38scnj 70 3 solutions solution NNS cord-191574-1g38scnj 70 4 of of IN cord-191574-1g38scnj 70 5 the the DT cord-191574-1g38scnj 70 6 SIR SIR NNP cord-191574-1g38scnj 70 7 system system NN cord-191574-1g38scnj 70 8 for for IN cord-191574-1g38scnj 70 9 µ µ NN cord-191574-1g38scnj 70 10 = = SYM cord-191574-1g38scnj 70 11 0 0 NFP cord-191574-1g38scnj 70 12 are be VBP cord-191574-1g38scnj 70 13 obtained obtain VBN cord-191574-1g38scnj 70 14 , , , cord-191574-1g38scnj 70 15 by by IN cord-191574-1g38scnj 70 16 using use VBG cord-191574-1g38scnj 70 17 the the DT cord-191574-1g38scnj 70 18 Adomian Adomian NNP cord-191574-1g38scnj 70 19 and and CC cord-191574-1g38scnj 70 20 the the DT cord-191574-1g38scnj 70 21 Laplace Laplace NNP cord-191574-1g38scnj 70 22 - - HYPH cord-191574-1g38scnj 70 23 Adomian Adomian NNP cord-191574-1g38scnj 70 24 Decomposition decomposition NN cord-191574-1g38scnj 70 25 Methods Methods NNPS cord-191574-1g38scnj 70 26 in in IN cord-191574-1g38scnj 70 27 Section section NN cord-191574-1g38scnj 70 28 III III NNP cord-191574-1g38scnj 70 29 . . . cord-191574-1g38scnj 71 1 The the DT cord-191574-1g38scnj 71 2 comparison comparison NN cord-191574-1g38scnj 71 3 with with IN cord-191574-1g38scnj 71 4 the the DT cord-191574-1g38scnj 71 5 exact exact JJ cord-191574-1g38scnj 71 6 numerical numerical JJ cord-191574-1g38scnj 71 7 solutions solution NNS cord-191574-1g38scnj 71 8 is be VBZ cord-191574-1g38scnj 71 9 performed perform VBN cord-191574-1g38scnj 71 10 in in IN cord-191574-1g38scnj 71 11 Section Section NNP cord-191574-1g38scnj 71 12 IV IV NNP cord-191574-1g38scnj 71 13 . . . cord-191574-1g38scnj 72 1 We -PRON- PRP cord-191574-1g38scnj 72 2 discuss discuss VBP cord-191574-1g38scnj 72 3 and and CC cord-191574-1g38scnj 72 4 conclude conclude VBP cord-191574-1g38scnj 72 5 our -PRON- PRP$ cord-191574-1g38scnj 72 6 results result NNS cord-191574-1g38scnj 72 7 in in IN cord-191574-1g38scnj 72 8 Section section NN cord-191574-1g38scnj 72 9 V. V. NNP cord-191574-1g38scnj 73 1 In in IN cord-191574-1g38scnj 73 2 the the DT cord-191574-1g38scnj 73 3 present present JJ cord-191574-1g38scnj 73 4 Section section NN cord-191574-1g38scnj 73 5 we -PRON- PRP cord-191574-1g38scnj 73 6 will will MD cord-191574-1g38scnj 73 7 obtain obtain VB cord-191574-1g38scnj 73 8 the the DT cord-191574-1g38scnj 73 9 basic basic JJ cord-191574-1g38scnj 73 10 equation equation NN cord-191574-1g38scnj 73 11 describing describe VBG cord-191574-1g38scnj 73 12 the the DT cord-191574-1g38scnj 73 13 dynamics dynamic NNS cord-191574-1g38scnj 73 14 of of IN cord-191574-1g38scnj 73 15 the the DT cord-191574-1g38scnj 73 16 SIR SIR NNP cord-191574-1g38scnj 73 17 model model NN cord-191574-1g38scnj 73 18 with with IN cord-191574-1g38scnj 73 19 vital vital JJ cord-191574-1g38scnj 73 20 dynamics dynamic NNS cord-191574-1g38scnj 73 21 . . . cord-191574-1g38scnj 74 1 Then then RB cord-191574-1g38scnj 74 2 , , , cord-191574-1g38scnj 74 3 by by IN cord-191574-1g38scnj 74 4 using use VBG cord-191574-1g38scnj 74 5 this this DT cord-191574-1g38scnj 74 6 equation equation NN cord-191574-1g38scnj 74 7 , , , cord-191574-1g38scnj 74 8 we -PRON- PRP cord-191574-1g38scnj 74 9 will will MD cord-191574-1g38scnj 74 10 obtain obtain VB cord-191574-1g38scnj 74 11 semianalytical semianalytical JJ cord-191574-1g38scnj 74 12 , , , cord-191574-1g38scnj 74 13 but but CC cord-191574-1g38scnj 74 14 still still RB cord-191574-1g38scnj 74 15 having have VBG cord-191574-1g38scnj 74 16 a a DT cord-191574-1g38scnj 74 17 high high JJ cord-191574-1g38scnj 74 18 numerical numerical JJ cord-191574-1g38scnj 74 19 precision precision NN cord-191574-1g38scnj 74 20 , , , cord-191574-1g38scnj 74 21 solutions solution NNS cord-191574-1g38scnj 74 22 of of IN cord-191574-1g38scnj 74 23 the the DT cord-191574-1g38scnj 74 24 SIR SIR NNP cord-191574-1g38scnj 74 25 model model NN cord-191574-1g38scnj 74 26 with with IN cord-191574-1g38scnj 74 27 vital vital JJ cord-191574-1g38scnj 74 28 dynamics dynamic NNS cord-191574-1g38scnj 74 29 , , , cord-191574-1g38scnj 74 30 represented represent VBN cord-191574-1g38scnj 74 31 in in IN cord-191574-1g38scnj 74 32 the the DT cord-191574-1g38scnj 74 33 forms form NNS cord-191574-1g38scnj 74 34 of of IN cord-191574-1g38scnj 74 35 Adomian adomian JJ cord-191574-1g38scnj 74 36 type type NN cord-191574-1g38scnj 74 37 series series NN cord-191574-1g38scnj 74 38 , , , cord-191574-1g38scnj 74 39 containing contain VBG cord-191574-1g38scnj 74 40 exponential exponential JJ cord-191574-1g38scnj 74 41 terms term NNS cord-191574-1g38scnj 74 42 . . . cord-191574-1g38scnj 75 1 The the DT cord-191574-1g38scnj 75 2 strongly strongly RB cord-191574-1g38scnj 75 3 nonlinear nonlinear JJ cord-191574-1g38scnj 75 4 system system NN cord-191574-1g38scnj 75 5 of of IN cord-191574-1g38scnj 75 6 equations equation NNS cord-191574-1g38scnj 75 7 describing describe VBG cord-191574-1g38scnj 75 8 the the DT cord-191574-1g38scnj 75 9 SIR SIR NNP cord-191574-1g38scnj 75 10 model model NN cord-191574-1g38scnj 75 11 with with IN cord-191574-1g38scnj 75 12 vital vital JJ cord-191574-1g38scnj 75 13 dynamics dynamic NNS cord-191574-1g38scnj 75 14 is be VBZ cord-191574-1g38scnj 75 15 given give VBN cord-191574-1g38scnj 75 16 by by IN cord-191574-1g38scnj 75 17 [ [ -LRB- cord-191574-1g38scnj 75 18 1 1 CD cord-191574-1g38scnj 75 19 , , , cord-191574-1g38scnj 75 20 2 2 CD cord-191574-1g38scnj 75 21 , , , cord-191574-1g38scnj 75 22 4 4 CD cord-191574-1g38scnj 75 23 , , , cord-191574-1g38scnj 75 24 6 6 CD cord-191574-1g38scnj 75 25 ] ] -RRB- cord-191574-1g38scnj 75 26 , , , cord-191574-1g38scnj 75 27 where where WRB cord-191574-1g38scnj 75 28 x(t x(t NNP cord-191574-1g38scnj 75 29 ) ) -RRB- cord-191574-1g38scnj 76 1 > > XX cord-191574-1g38scnj 76 2 0 0 CD cord-191574-1g38scnj 76 3 , , , cord-191574-1g38scnj 76 4 y(t y(t NN cord-191574-1g38scnj 76 5 ) ) -RRB- cord-191574-1g38scnj 76 6 > > NFP cord-191574-1g38scnj 76 7 0 0 NFP cord-191574-1g38scnj 76 8 and and CC cord-191574-1g38scnj 76 9 z(t z(t CD cord-191574-1g38scnj 76 10 ) ) -RRB- cord-191574-1g38scnj 77 1 > > XX cord-191574-1g38scnj 77 2 0 0 CD cord-191574-1g38scnj 77 3 , , , cord-191574-1g38scnj 77 4 ∀t ∀t NNP cord-191574-1g38scnj 77 5 ≥ ≥ CD cord-191574-1g38scnj 77 6 0 0 NNP cord-191574-1g38scnj 77 7 . . . cord-191574-1g38scnj 78 1 The the DT cord-191574-1g38scnj 78 2 system system NN cord-191574-1g38scnj 78 3 of of IN cord-191574-1g38scnj 78 4 strongly strongly RB cord-191574-1g38scnj 78 5 nonlinear nonlinear JJ cord-191574-1g38scnj 78 6 differential differential JJ cord-191574-1g38scnj 78 7 equations equation NNS cord-191574-1g38scnj 78 8 ( ( -LRB- cord-191574-1g38scnj 78 9 3)-(5 3)-(5 CD cord-191574-1g38scnj 78 10 ) ) -RRB- cord-191574-1g38scnj 78 11 must must MD cord-191574-1g38scnj 78 12 be be VB cord-191574-1g38scnj 78 13 integrated integrate VBN cord-191574-1g38scnj 78 14 with with IN cord-191574-1g38scnj 78 15 the the DT cord-191574-1g38scnj 78 16 initial initial JJ cord-191574-1g38scnj 78 17 conditions condition NNS cord-191574-1g38scnj 78 18 The the DT cord-191574-1g38scnj 78 19 time time NN cord-191574-1g38scnj 78 20 evolution evolution NN cord-191574-1g38scnj 78 21 of of IN cord-191574-1g38scnj 78 22 the the DT cord-191574-1g38scnj 78 23 model model NN cord-191574-1g38scnj 78 24 is be VBZ cord-191574-1g38scnj 78 25 determined determine VBN cord-191574-1g38scnj 78 26 by by IN cord-191574-1g38scnj 78 27 three three CD cord-191574-1g38scnj 78 28 epidemiological epidemiological JJ cord-191574-1g38scnj 78 29 parameters parameter NNS cord-191574-1g38scnj 78 30 , , , cord-191574-1g38scnj 78 31 the the DT cord-191574-1g38scnj 78 32 infection infection NN cord-191574-1g38scnj 78 33 rate rate NN cord-191574-1g38scnj 78 34 β β NN cord-191574-1g38scnj 78 35 , , , cord-191574-1g38scnj 78 36 the the DT cord-191574-1g38scnj 78 37 mean mean JJ cord-191574-1g38scnj 78 38 recovery recovery NN cord-191574-1g38scnj 78 39 rate rate NN cord-191574-1g38scnj 78 40 γ γ NN cord-191574-1g38scnj 78 41 , , , cord-191574-1g38scnj 78 42 and and CC cord-191574-1g38scnj 78 43 µ µ NN cord-191574-1g38scnj 78 44 , , , cord-191574-1g38scnj 78 45 representing represent VBG cord-191574-1g38scnj 78 46 the the DT cord-191574-1g38scnj 78 47 natural natural JJ cord-191574-1g38scnj 78 48 death death NN cord-191574-1g38scnj 78 49 rate rate NN cord-191574-1g38scnj 78 50 , , , cord-191574-1g38scnj 78 51 which which WDT cord-191574-1g38scnj 78 52 in in IN cord-191574-1g38scnj 78 53 the the DT cord-191574-1g38scnj 78 54 present present JJ cord-191574-1g38scnj 78 55 investigation investigation NN cord-191574-1g38scnj 78 56 is be VBZ cord-191574-1g38scnj 78 57 assumed assume VBN cord-191574-1g38scnj 78 58 to to TO cord-191574-1g38scnj 78 59 be be VB cord-191574-1g38scnj 78 60 equal equal JJ cord-191574-1g38scnj 78 61 to to IN cord-191574-1g38scnj 78 62 the the DT cord-191574-1g38scnj 78 63 birth birth NN cord-191574-1g38scnj 78 64 rate rate NN cord-191574-1g38scnj 78 65 . . . cord-191574-1g38scnj 79 1 In in IN cord-191574-1g38scnj 79 2 the the DT cord-191574-1g38scnj 79 3 following follow VBG cord-191574-1g38scnj 79 4 β β NN cord-191574-1g38scnj 79 5 , , , cord-191574-1g38scnj 79 6 γ γ NN cord-191574-1g38scnj 79 7 , , , cord-191574-1g38scnj 79 8 and and CC cord-191574-1g38scnj 79 9 µ µ NNS cord-191574-1g38scnj 79 10 are be VBP cord-191574-1g38scnj 79 11 assumed assume VBN cord-191574-1g38scnj 79 12 to to TO cord-191574-1g38scnj 79 13 be be VB cord-191574-1g38scnj 79 14 positive positive JJ cord-191574-1g38scnj 79 15 constants constant NNS cord-191574-1g38scnj 79 16 . . . cord-191574-1g38scnj 80 1 By by IN cord-191574-1g38scnj 80 2 adding add VBG cord-191574-1g38scnj 80 3 Eqs Eqs NNP cord-191574-1g38scnj 80 4 . . . cord-191574-1g38scnj 81 1 ( ( -LRB- cord-191574-1g38scnj 81 2 3)-(5 3)-(5 CD cord-191574-1g38scnj 81 3 ) ) -RRB- cord-191574-1g38scnj 81 4 , , , cord-191574-1g38scnj 81 5 and and CC cord-191574-1g38scnj 81 6 integrating integrate VBG cord-191574-1g38scnj 81 7 the the DT cord-191574-1g38scnj 81 8 resulting result VBG cord-191574-1g38scnj 81 9 equation equation NN cord-191574-1g38scnj 81 10 we -PRON- PRP cord-191574-1g38scnj 81 11 immediately immediately RB cord-191574-1g38scnj 81 12 obtain obtain VBP cord-191574-1g38scnj 81 13 where where WRB cord-191574-1g38scnj 81 14 N n NN cord-191574-1g38scnj 81 15 0 0 CD cord-191574-1g38scnj 81 16 is be VBZ cord-191574-1g38scnj 81 17 an an DT cord-191574-1g38scnj 81 18 arbitrary arbitrary JJ cord-191574-1g38scnj 81 19 integration integration NN cord-191574-1g38scnj 81 20 constant constant NN cord-191574-1g38scnj 81 21 . . . cord-191574-1g38scnj 82 1 In in IN cord-191574-1g38scnj 82 2 order order NN cord-191574-1g38scnj 82 3 to to TO cord-191574-1g38scnj 82 4 assure assure VB cord-191574-1g38scnj 82 5 that that IN cord-191574-1g38scnj 82 6 the the DT cord-191574-1g38scnj 82 7 total total JJ cord-191574-1g38scnj 82 8 number number NN cord-191574-1g38scnj 82 9 of of IN cord-191574-1g38scnj 82 10 individuals individual NNS cord-191574-1g38scnj 82 11 in in IN cord-191574-1g38scnj 82 12 the the DT cord-191574-1g38scnj 82 13 group group NN cord-191574-1g38scnj 82 14 is be VBZ cord-191574-1g38scnj 82 15 a a DT cord-191574-1g38scnj 82 16 constant constant NN cord-191574-1g38scnj 82 17 , , , cord-191574-1g38scnj 82 18 we -PRON- PRP cord-191574-1g38scnj 82 19 must must MD cord-191574-1g38scnj 82 20 fix fix VB cord-191574-1g38scnj 82 21 the the DT cord-191574-1g38scnj 82 22 integration integration NN cord-191574-1g38scnj 82 23 constant constant JJ cord-191574-1g38scnj 82 24 N n CD cord-191574-1g38scnj 82 25 0 0 CD cord-191574-1g38scnj 82 26 as as IN cord-191574-1g38scnj 82 27 zero zero CD cord-191574-1g38scnj 82 28 , , , cord-191574-1g38scnj 82 29 N n CD cord-191574-1g38scnj 82 30 0 0 CD cord-191574-1g38scnj 82 31 = = SYM cord-191574-1g38scnj 82 32 0 0 CD cord-191574-1g38scnj 82 33 . . . cord-191574-1g38scnj 83 1 In in IN cord-191574-1g38scnj 83 2 the the DT cord-191574-1g38scnj 83 3 following following NN cord-191574-1g38scnj 83 4 , , , cord-191574-1g38scnj 83 5 in in IN cord-191574-1g38scnj 83 6 order order NN cord-191574-1g38scnj 83 7 to to TO cord-191574-1g38scnj 83 8 significantly significantly RB cord-191574-1g38scnj 83 9 simplify simplify VB cord-191574-1g38scnj 83 10 the the DT cord-191574-1g38scnj 83 11 mathematical mathematical JJ cord-191574-1g38scnj 83 12 formalism formalism NN cord-191574-1g38scnj 83 13 we -PRON- PRP cord-191574-1g38scnj 83 14 introduce introduce VBP cord-191574-1g38scnj 83 15 first first RB cord-191574-1g38scnj 83 16 a a DT cord-191574-1g38scnj 83 17 new new JJ cord-191574-1g38scnj 83 18 function function NN cord-191574-1g38scnj 83 19 u(t u(t NNP cord-191574-1g38scnj 83 20 ) ) -RRB- cord-191574-1g38scnj 83 21 , , , cord-191574-1g38scnj 83 22 related relate VBN cord-191574-1g38scnj 83 23 to to IN cord-191574-1g38scnj 83 24 y(t y(t NN cord-191574-1g38scnj 83 25 ) ) -RRB- cord-191574-1g38scnj 83 26 by by IN cord-191574-1g38scnj 83 27 and and CC cord-191574-1g38scnj 83 28 which which WDT cord-191574-1g38scnj 83 29 satisfies satisfy VBZ cord-191574-1g38scnj 83 30 the the DT cord-191574-1g38scnj 83 31 initial initial JJ cord-191574-1g38scnj 83 32 condition condition NN cord-191574-1g38scnj 83 33 and and CC cord-191574-1g38scnj 83 34 thus thus RB cord-191574-1g38scnj 83 35 obviously obviously RB cord-191574-1g38scnj 83 36 giving give VBG cord-191574-1g38scnj 83 37 y(0 y(0 NNP cord-191574-1g38scnj 83 38 ) ) -RRB- cord-191574-1g38scnj 83 39 = = SYM cord-191574-1g38scnj 83 40 N n CD cord-191574-1g38scnj 83 41 2 2 CD cord-191574-1g38scnj 83 42 . . . cord-191574-1g38scnj 84 1 Then then RB cord-191574-1g38scnj 84 2 from from IN cord-191574-1g38scnj 84 3 Eq Eq NNP cord-191574-1g38scnj 84 4 . . . cord-191574-1g38scnj 85 1 ( ( -LRB- cord-191574-1g38scnj 85 2 4 4 LS cord-191574-1g38scnj 85 3 ) ) -RRB- cord-191574-1g38scnj 85 4 we -PRON- PRP cord-191574-1g38scnj 85 5 obtain obtain VBP cord-191574-1g38scnj 85 6 for for IN cord-191574-1g38scnj 85 7 x(t x(t NNP cord-191574-1g38scnj 85 8 ) ) -RRB- cord-191574-1g38scnj 86 1 the the DT cord-191574-1g38scnj 86 2 simple simple JJ cord-191574-1g38scnj 86 3 expression expression NN cord-191574-1g38scnj 86 4 By by IN cord-191574-1g38scnj 86 5 substituting substitute VBG cord-191574-1g38scnj 86 6 Eqs Eqs NNP cord-191574-1g38scnj 86 7 . . . cord-191574-1g38scnj 87 1 ( ( -LRB- cord-191574-1g38scnj 87 2 8) 8) NNP cord-191574-1g38scnj 87 3 and and CC cord-191574-1g38scnj 87 4 ( ( -LRB- cord-191574-1g38scnj 87 5 10 10 CD cord-191574-1g38scnj 87 6 ) ) -RRB- cord-191574-1g38scnj 87 7 into into IN cord-191574-1g38scnj 87 8 Eq Eq NNP cord-191574-1g38scnj 87 9 . . . cord-191574-1g38scnj 88 1 ( ( -LRB- cord-191574-1g38scnj 88 2 3 3 LS cord-191574-1g38scnj 88 3 ) ) -RRB- cord-191574-1g38scnj 88 4 , , , cord-191574-1g38scnj 88 5 the the DT cord-191574-1g38scnj 88 6 latter latter NN cord-191574-1g38scnj 88 7 becomes become VBZ cord-191574-1g38scnj 88 8 Eq Eq NNP cord-191574-1g38scnj 88 9 . . . cord-191574-1g38scnj 89 1 ( ( -LRB- cord-191574-1g38scnj 89 2 11 11 CD cord-191574-1g38scnj 89 3 ) ) -RRB- cord-191574-1g38scnj 89 4 can can MD cord-191574-1g38scnj 89 5 be be VB cord-191574-1g38scnj 89 6 reformulated reformulate VBN cord-191574-1g38scnj 89 7 as as IN cord-191574-1g38scnj 89 8 Eq Eq NNP cord-191574-1g38scnj 89 9 . . . cord-191574-1g38scnj 90 1 ( ( -LRB- cord-191574-1g38scnj 90 2 12 12 CD cord-191574-1g38scnj 90 3 ) ) -RRB- cord-191574-1g38scnj 90 4 represents represent VBZ cord-191574-1g38scnj 90 5 the the DT cord-191574-1g38scnj 90 6 basic basic JJ cord-191574-1g38scnj 90 7 dynamical dynamical JJ cord-191574-1g38scnj 90 8 evolution evolution NN cord-191574-1g38scnj 90 9 equation equation NN cord-191574-1g38scnj 90 10 of of IN cord-191574-1g38scnj 90 11 the the DT cord-191574-1g38scnj 90 12 SIR SIR NNP cord-191574-1g38scnj 90 13 model model NN cord-191574-1g38scnj 90 14 with with IN cord-191574-1g38scnj 90 15 vital vital JJ cord-191574-1g38scnj 90 16 dynamics dynamic NNS cord-191574-1g38scnj 90 17 . . . cord-191574-1g38scnj 91 1 It -PRON- PRP cord-191574-1g38scnj 91 2 must must MD cord-191574-1g38scnj 91 3 be be VB cord-191574-1g38scnj 91 4 solved solve VBN cord-191574-1g38scnj 91 5 with with IN cord-191574-1g38scnj 91 6 the the DT cord-191574-1g38scnj 91 7 initial initial JJ cord-191574-1g38scnj 91 8 conditions condition NNS cord-191574-1g38scnj 91 9 By by IN cord-191574-1g38scnj 91 10 representing represent VBG cord-191574-1g38scnj 91 11 z(t z(t CD cord-191574-1g38scnj 91 12 ) ) -RRB- cord-191574-1g38scnj 91 13 as as IN cord-191574-1g38scnj 91 14 Eq Eq NNP cord-191574-1g38scnj 91 15 . . . cord-191574-1g38scnj 92 1 ( ( -LRB- cord-191574-1g38scnj 92 2 5 5 LS cord-191574-1g38scnj 92 3 ) ) -RRB- cord-191574-1g38scnj 92 4 becomes become VBZ cord-191574-1g38scnj 92 5 giving giving NN cord-191574-1g38scnj 92 6 and and CC cord-191574-1g38scnj 92 7 respectively respectively RB cord-191574-1g38scnj 92 8 , , , cord-191574-1g38scnj 92 9 where where WRB cord-191574-1g38scnj 92 10 we -PRON- PRP cord-191574-1g38scnj 92 11 have have VBP cord-191574-1g38scnj 92 12 used use VBN cord-191574-1g38scnj 92 13 the the DT cord-191574-1g38scnj 92 14 condition condition NN cord-191574-1g38scnj 92 15 w(0 w(0 VBN cord-191574-1g38scnj 92 16 ) ) -RRB- cord-191574-1g38scnj 92 17 = = NFP cord-191574-1g38scnj 93 1 z(0 z(0 LS cord-191574-1g38scnj 93 2 ) ) -RRB- cord-191574-1g38scnj 94 1 = = SYM cord-191574-1g38scnj 94 2 N N NNP cord-191574-1g38scnj 94 3 3 3 CD cord-191574-1g38scnj 94 4 . . . cord-191574-1g38scnj 95 1 The the DT cord-191574-1g38scnj 95 2 general general JJ cord-191574-1g38scnj 95 3 solution solution NN cord-191574-1g38scnj 95 4 of of IN cord-191574-1g38scnj 95 5 Eq Eq NNP cord-191574-1g38scnj 95 6 . . . cord-191574-1g38scnj 96 1 ( ( -LRB- cord-191574-1g38scnj 96 2 12 12 CD cord-191574-1g38scnj 96 3 ) ) -RRB- cord-191574-1g38scnj 96 4 can can MD cord-191574-1g38scnj 96 5 not not RB cord-191574-1g38scnj 96 6 be be VB cord-191574-1g38scnj 96 7 obtained obtain VBN cord-191574-1g38scnj 96 8 in in IN cord-191574-1g38scnj 96 9 a a DT cord-191574-1g38scnj 96 10 closed closed JJ cord-191574-1g38scnj 96 11 ( ( -LRB- cord-191574-1g38scnj 96 12 exact exact JJ cord-191574-1g38scnj 96 13 ) ) -RRB- cord-191574-1g38scnj 96 14 form form NN cord-191574-1g38scnj 96 15 . . . cord-191574-1g38scnj 97 1 In in IN cord-191574-1g38scnj 97 2 the the DT cord-191574-1g38scnj 97 3 present present JJ cord-191574-1g38scnj 97 4 Section section NN cord-191574-1g38scnj 97 5 we -PRON- PRP cord-191574-1g38scnj 97 6 will will MD cord-191574-1g38scnj 97 7 consider consider VB cord-191574-1g38scnj 97 8 the the DT cord-191574-1g38scnj 97 9 applications application NNS cord-191574-1g38scnj 97 10 of of IN cord-191574-1g38scnj 97 11 the the DT cord-191574-1g38scnj 97 12 Adomian adomian JJ cord-191574-1g38scnj 97 13 Decomposition Decomposition NNP cord-191574-1g38scnj 97 14 Method Method NNP cord-191574-1g38scnj 97 15 for for IN cord-191574-1g38scnj 97 16 the the DT cord-191574-1g38scnj 97 17 study study NN cord-191574-1g38scnj 97 18 of of IN cord-191574-1g38scnj 97 19 the the DT cord-191574-1g38scnj 97 20 SIR SIR NNP cord-191574-1g38scnj 97 21 model model NN cord-191574-1g38scnj 97 22 with with IN cord-191574-1g38scnj 97 23 vital vital JJ cord-191574-1g38scnj 97 24 dynamics dynamic NNS cord-191574-1g38scnj 97 25 . . . cord-191574-1g38scnj 98 1 In in IN cord-191574-1g38scnj 98 2 order order NN cord-191574-1g38scnj 98 3 to to TO cord-191574-1g38scnj 98 4 obtain obtain VB cord-191574-1g38scnj 98 5 a a DT cord-191574-1g38scnj 98 6 semianalytical semianalytical JJ cord-191574-1g38scnj 98 7 solution solution NN cord-191574-1g38scnj 98 8 of of IN cord-191574-1g38scnj 98 9 the the DT cord-191574-1g38scnj 98 10 model model NN cord-191574-1g38scnj 98 11 we -PRON- PRP cord-191574-1g38scnj 98 12 will will MD cord-191574-1g38scnj 98 13 consider consider VB cord-191574-1g38scnj 98 14 first first RB cord-191574-1g38scnj 98 15 the the DT cord-191574-1g38scnj 98 16 solution solution NN cord-191574-1g38scnj 98 17 of of IN cord-191574-1g38scnj 98 18 the the DT cord-191574-1g38scnj 98 19 basic basic JJ cord-191574-1g38scnj 98 20 evolution evolution NN cord-191574-1g38scnj 98 21 equation equation NN cord-191574-1g38scnj 98 22 ( ( -LRB- cord-191574-1g38scnj 98 23 12 12 CD cord-191574-1g38scnj 98 24 ) ) -RRB- cord-191574-1g38scnj 98 25 by by IN cord-191574-1g38scnj 98 26 obtaining obtain VBG cord-191574-1g38scnj 98 27 the the DT cord-191574-1g38scnj 98 28 Adomian adomian JJ cord-191574-1g38scnj 98 29 type type NN cord-191574-1g38scnj 98 30 recursive recursive JJ cord-191574-1g38scnj 98 31 relations relation NNS cord-191574-1g38scnj 98 32 for for IN cord-191574-1g38scnj 98 33 solving solve VBG cord-191574-1g38scnj 98 34 Eq Eq NNP cord-191574-1g38scnj 98 35 . . . cord-191574-1g38scnj 99 1 ( ( -LRB- cord-191574-1g38scnj 99 2 12 12 CD cord-191574-1g38scnj 99 3 ) ) -RRB- cord-191574-1g38scnj 99 4 in in IN cord-191574-1g38scnj 99 5 both both CC cord-191574-1g38scnj 99 6 the the DT cord-191574-1g38scnj 99 7 standard standard JJ cord-191574-1g38scnj 99 8 Adomian Adomian NNP cord-191574-1g38scnj 99 9 as as RB cord-191574-1g38scnj 99 10 well well RB cord-191574-1g38scnj 99 11 as as IN cord-191574-1g38scnj 99 12 in in IN cord-191574-1g38scnj 99 13 the the DT cord-191574-1g38scnj 99 14 Laplace Laplace NNP cord-191574-1g38scnj 99 15 - - HYPH cord-191574-1g38scnj 99 16 Adomian Adomian NNP cord-191574-1g38scnj 99 17 Decomposition decomposition NN cord-191574-1g38scnj 99 18 methods method NNS cord-191574-1g38scnj 99 19 . . . cord-191574-1g38scnj 100 1 We -PRON- PRP cord-191574-1g38scnj 100 2 will will MD cord-191574-1g38scnj 100 3 begin begin VB cord-191574-1g38scnj 100 4 our -PRON- PRP$ cord-191574-1g38scnj 100 5 investigations investigation NNS cord-191574-1g38scnj 100 6 of of IN cord-191574-1g38scnj 100 7 Eq Eq NNP cord-191574-1g38scnj 100 8 . . . cord-191574-1g38scnj 101 1 ( ( -LRB- cord-191574-1g38scnj 101 2 12 12 CD cord-191574-1g38scnj 101 3 ) ) -RRB- cord-191574-1g38scnj 101 4 by by IN cord-191574-1g38scnj 101 5 applying apply VBG cord-191574-1g38scnj 101 6 first first RB cord-191574-1g38scnj 101 7 the the DT cord-191574-1g38scnj 101 8 standard standard JJ cord-191574-1g38scnj 101 9 Adomian adomian JJ cord-191574-1g38scnj 101 10 Decomposition Decomposition NNP cord-191574-1g38scnj 101 11 Method Method NNP cord-191574-1g38scnj 101 12 . . . cord-191574-1g38scnj 102 1 We -PRON- PRP cord-191574-1g38scnj 102 2 integrate integrate VBP cord-191574-1g38scnj 102 3 Eq Eq NNP cord-191574-1g38scnj 102 4 . . . cord-191574-1g38scnj 103 1 ( ( -LRB- cord-191574-1g38scnj 103 2 12 12 CD cord-191574-1g38scnj 103 3 ) ) -RRB- cord-191574-1g38scnj 103 4 between between IN cord-191574-1g38scnj 103 5 0 0 CD cord-191574-1g38scnj 103 6 and and CC cord-191574-1g38scnj 103 7 t. t. NN cord-191574-1g38scnj 104 1 With with IN cord-191574-1g38scnj 104 2 the the DT cord-191574-1g38scnj 104 3 use use NN cord-191574-1g38scnj 104 4 of of IN cord-191574-1g38scnj 104 5 the the DT cord-191574-1g38scnj 104 6 initial initial JJ cord-191574-1g38scnj 104 7 conditions condition NNS cord-191574-1g38scnj 104 8 we -PRON- PRP cord-191574-1g38scnj 104 9 obtain obtain VBP cord-191574-1g38scnj 104 10 Again again RB cord-191574-1g38scnj 104 11 we -PRON- PRP cord-191574-1g38scnj 104 12 integrate integrate VBP cord-191574-1g38scnj 104 13 Eq Eq NNP cord-191574-1g38scnj 104 14 . . . cord-191574-1g38scnj 105 1 ( ( -LRB- cord-191574-1g38scnj 105 2 18 18 CD cord-191574-1g38scnj 105 3 ) ) -RRB- cord-191574-1g38scnj 105 4 between between IN cord-191574-1g38scnj 105 5 0 0 CD cord-191574-1g38scnj 105 6 and and CC cord-191574-1g38scnj 105 7 t t NN cord-191574-1g38scnj 105 8 to to TO cord-191574-1g38scnj 105 9 find find VB cord-191574-1g38scnj 105 10 Now now RB cord-191574-1g38scnj 105 11 we -PRON- PRP cord-191574-1g38scnj 105 12 will will MD cord-191574-1g38scnj 105 13 apply apply VB cord-191574-1g38scnj 105 14 the the DT cord-191574-1g38scnj 105 15 Adomian adomian JJ cord-191574-1g38scnj 105 16 Decomposition decomposition NN cord-191574-1g38scnj 105 17 method method NN cord-191574-1g38scnj 105 18 to to IN cord-191574-1g38scnj 105 19 Eq Eq NNP cord-191574-1g38scnj 105 20 . . . cord-191574-1g38scnj 106 1 ( ( -LRB- cord-191574-1g38scnj 106 2 19 19 CD cord-191574-1g38scnj 106 3 ) ) -RRB- cord-191574-1g38scnj 106 4 . . . cord-191574-1g38scnj 107 1 For for IN cord-191574-1g38scnj 107 2 this this DT cord-191574-1g38scnj 107 3 we -PRON- PRP cord-191574-1g38scnj 107 4 assume assume VBP cord-191574-1g38scnj 107 5 and and CC cord-191574-1g38scnj 107 6 where where WRB cord-191574-1g38scnj 107 7 A a DT cord-191574-1g38scnj 107 8 n n NN cord-191574-1g38scnj 107 9 ( ( -LRB- cord-191574-1g38scnj 107 10 t t NN cord-191574-1g38scnj 107 11 ) ) -RRB- cord-191574-1g38scnj 107 12 are be VBP cord-191574-1g38scnj 107 13 the the DT cord-191574-1g38scnj 107 14 Adomian adomian JJ cord-191574-1g38scnj 107 15 polynomials polynomial NNS cord-191574-1g38scnj 107 16 , , , cord-191574-1g38scnj 107 17 defined define VBN cord-191574-1g38scnj 107 18 for for IN cord-191574-1g38scnj 107 19 an an DT cord-191574-1g38scnj 107 20 arbitrary arbitrary JJ cord-191574-1g38scnj 107 21 function function NN cord-191574-1g38scnj 107 22 f f NN cord-191574-1g38scnj 107 23 ( ( -LRB- cord-191574-1g38scnj 107 24 u(t u(t NNP cord-191574-1g38scnj 107 25 ) ) -RRB- cord-191574-1g38scnj 107 26 ) ) -RRB- cord-191574-1g38scnj 107 27 according accord VBG cord-191574-1g38scnj 107 28 to to IN cord-191574-1g38scnj 107 29 the the DT cord-191574-1g38scnj 107 30 general general JJ cord-191574-1g38scnj 107 31 formula formula NN cord-191574-1g38scnj 107 32 [ [ -LRB- cord-191574-1g38scnj 107 33 32 32 CD cord-191574-1g38scnj 107 34 ] ] -RRB- cord-191574-1g38scnj 107 35 Substituting substitute VBG cord-191574-1g38scnj 107 36 Eqs Eqs NNP cord-191574-1g38scnj 107 37 . . . cord-191574-1g38scnj 108 1 ( ( -LRB- cord-191574-1g38scnj 108 2 20 20 CD cord-191574-1g38scnj 108 3 ) ) -RRB- cord-191574-1g38scnj 108 4 and and CC cord-191574-1g38scnj 108 5 ( ( -LRB- cord-191574-1g38scnj 108 6 21 21 CD cord-191574-1g38scnj 108 7 ) ) -RRB- cord-191574-1g38scnj 108 8 into into IN cord-191574-1g38scnj 108 9 Eq Eq NNP cord-191574-1g38scnj 108 10 . . . cord-191574-1g38scnj 109 1 ( ( -LRB- cord-191574-1g38scnj 109 2 19 19 CD cord-191574-1g38scnj 109 3 ) ) -RRB- cord-191574-1g38scnj 109 4 we -PRON- PRP cord-191574-1g38scnj 109 5 obtain obtain VBP cord-191574-1g38scnj 109 6 Explicitly explicitly RB cord-191574-1g38scnj 109 7 , , , cord-191574-1g38scnj 109 8 we -PRON- PRP cord-191574-1g38scnj 109 9 can can MD cord-191574-1g38scnj 109 10 write write VB cord-191574-1g38scnj 109 11 the the DT cord-191574-1g38scnj 109 12 above above JJ cord-191574-1g38scnj 109 13 equation equation NN cord-191574-1g38scnj 109 14 as as IN cord-191574-1g38scnj 109 15 Now now RB cord-191574-1g38scnj 109 16 we -PRON- PRP cord-191574-1g38scnj 109 17 take take VBP cord-191574-1g38scnj 109 18 ... ... . cord-191574-1g38scnj 110 1 Therefore therefore RB cord-191574-1g38scnj 110 2 we -PRON- PRP cord-191574-1g38scnj 110 3 have have VBP cord-191574-1g38scnj 110 4 obtained obtain VBN cord-191574-1g38scnj 110 5 the the DT cord-191574-1g38scnj 110 6 iteration iteration NN cord-191574-1g38scnj 111 1 Now now RB cord-191574-1g38scnj 111 2 we -PRON- PRP cord-191574-1g38scnj 111 3 can can MD cord-191574-1g38scnj 111 4 use use VB cord-191574-1g38scnj 111 5 the the DT cord-191574-1g38scnj 111 6 Cauchy Cauchy NNP cord-191574-1g38scnj 111 7 formula formula NN cord-191574-1g38scnj 111 8 for for IN cord-191574-1g38scnj 111 9 repeated repeat VBN cord-191574-1g38scnj 111 10 integration integration NN cord-191574-1g38scnj 111 11 , , , cord-191574-1g38scnj 111 12 which which WDT cord-191574-1g38scnj 111 13 gives give VBZ cord-191574-1g38scnj 111 14 Thus thus RB cord-191574-1g38scnj 111 15 Eq Eq NNP cord-191574-1g38scnj 111 16 . . . cord-191574-1g38scnj 112 1 ( ( -LRB- cord-191574-1g38scnj 112 2 30 30 CD cord-191574-1g38scnj 112 3 ) ) -RRB- cord-191574-1g38scnj 112 4 becomes become VBZ cord-191574-1g38scnj 112 5 In in IN cord-191574-1g38scnj 112 6 the the DT cord-191574-1g38scnj 112 7 following following NN cord-191574-1g38scnj 112 8 we -PRON- PRP cord-191574-1g38scnj 112 9 denote denote VBP cord-191574-1g38scnj 113 1 Hence hence RB cord-191574-1g38scnj 113 2 The the DT cord-191574-1g38scnj 113 3 first first JJ cord-191574-1g38scnj 113 4 Adomian adomian JJ cord-191574-1g38scnj 113 5 polynomial polynomial NN cord-191574-1g38scnj 113 6 is be VBZ cord-191574-1g38scnj 113 7 given give VBN cord-191574-1g38scnj 113 8 by by IN cord-191574-1g38scnj 114 1 For for IN cord-191574-1g38scnj 114 2 u u NNP cord-191574-1g38scnj 114 3 1 1 CD cord-191574-1g38scnj 114 4 ( ( -LRB- cord-191574-1g38scnj 114 5 t t NN cord-191574-1g38scnj 114 6 ) ) -RRB- cord-191574-1g38scnj 114 7 we -PRON- PRP cord-191574-1g38scnj 114 8 obtain obtain VBP cord-191574-1g38scnj 115 1 where where WRB cord-191574-1g38scnj 115 2 erf(z erf(z NNP cord-191574-1g38scnj 115 3 ) ) -RRB- cord-191574-1g38scnj 115 4 = = SYM cord-191574-1g38scnj 115 5 2/ 2/ CD cord-191574-1g38scnj 115 6 √ √ NNP cord-191574-1g38scnj 116 1 π π LS cord-191574-1g38scnj 117 1 z z LS cord-191574-1g38scnj 117 2 0 0 CD cord-191574-1g38scnj 117 3 e e NN cord-191574-1g38scnj 117 4 −t −t NNP cord-191574-1g38scnj 117 5 2 2 CD cord-191574-1g38scnj 117 6 dt dt NN cord-191574-1g38scnj 117 7 is be VBZ cord-191574-1g38scnj 117 8 the the DT cord-191574-1g38scnj 117 9 error error NN cord-191574-1g38scnj 117 10 function function NN cord-191574-1g38scnj 117 11 . . . cord-191574-1g38scnj 118 1 The the DT cord-191574-1g38scnj 118 2 next next JJ cord-191574-1g38scnj 118 3 term term NN cord-191574-1g38scnj 118 4 u u NN cord-191574-1g38scnj 118 5 2 2 CD cord-191574-1g38scnj 118 6 can can MD cord-191574-1g38scnj 118 7 not not RB cord-191574-1g38scnj 118 8 be be VB cord-191574-1g38scnj 118 9 obtained obtain VBN cord-191574-1g38scnj 118 10 in in IN cord-191574-1g38scnj 118 11 an an DT cord-191574-1g38scnj 118 12 exact exact JJ cord-191574-1g38scnj 118 13 form form NN cord-191574-1g38scnj 118 14 , , , cord-191574-1g38scnj 118 15 and and CC cord-191574-1g38scnj 118 16 hence hence RB cord-191574-1g38scnj 118 17 we -PRON- PRP cord-191574-1g38scnj 118 18 will will MD cord-191574-1g38scnj 118 19 not not RB cord-191574-1g38scnj 118 20 present present VB cord-191574-1g38scnj 118 21 it -PRON- PRP cord-191574-1g38scnj 118 22 . . . cord-191574-1g38scnj 119 1 In in IN cord-191574-1g38scnj 119 2 the the DT cord-191574-1g38scnj 119 3 following following NN cord-191574-1g38scnj 119 4 we -PRON- PRP cord-191574-1g38scnj 119 5 will will MD cord-191574-1g38scnj 119 6 look look VB cord-191574-1g38scnj 119 7 for for IN cord-191574-1g38scnj 119 8 a a DT cord-191574-1g38scnj 119 9 series series NN cord-191574-1g38scnj 119 10 solution solution NN cord-191574-1g38scnj 119 11 of of IN cord-191574-1g38scnj 119 12 Eq Eq NNP cord-191574-1g38scnj 119 13 . . . cord-191574-1g38scnj 120 1 ( ( -LRB- cord-191574-1g38scnj 120 2 12 12 CD cord-191574-1g38scnj 120 3 ) ) -RRB- cord-191574-1g38scnj 120 4 , , , cord-191574-1g38scnj 120 5 by by IN cord-191574-1g38scnj 120 6 using use VBG cord-191574-1g38scnj 120 7 the the DT cord-191574-1g38scnj 120 8 Laplace Laplace NNP cord-191574-1g38scnj 120 9 - - HYPH cord-191574-1g38scnj 120 10 Adomian Adomian NNP cord-191574-1g38scnj 120 11 Decomposition decomposition NN cord-191574-1g38scnj 120 12 Method Method NNP cord-191574-1g38scnj 120 13 . . . cord-191574-1g38scnj 121 1 In in IN cord-191574-1g38scnj 121 2 the the DT cord-191574-1g38scnj 121 3 Laplace Laplace NNP cord-191574-1g38scnj 121 4 - - HYPH cord-191574-1g38scnj 121 5 Adomian Adomian NNP cord-191574-1g38scnj 121 6 Decomposition decomposition NN cord-191574-1g38scnj 121 7 Method Method NNP cord-191574-1g38scnj 121 8 we -PRON- PRP cord-191574-1g38scnj 121 9 first first RB cord-191574-1g38scnj 121 10 apply apply VBP cord-191574-1g38scnj 121 11 the the DT cord-191574-1g38scnj 121 12 Laplace Laplace NNP cord-191574-1g38scnj 121 13 transformation transformation NN cord-191574-1g38scnj 121 14 operator operator NN cord-191574-1g38scnj 121 15 L L NNP cord-191574-1g38scnj 121 16 x x NNP cord-191574-1g38scnj 121 17 , , , cord-191574-1g38scnj 121 18 defined define VBN cord-191574-1g38scnj 121 19 as as IN cord-191574-1g38scnj 121 20 By by IN cord-191574-1g38scnj 121 21 using use VBG cord-191574-1g38scnj 121 22 the the DT cord-191574-1g38scnj 121 23 properties property NNS cord-191574-1g38scnj 121 24 of of IN cord-191574-1g38scnj 121 25 the the DT cord-191574-1g38scnj 121 26 Laplace Laplace NNP cord-191574-1g38scnj 121 27 transform transform NN cord-191574-1g38scnj 121 28 , , , cord-191574-1g38scnj 121 29 giving give VBG cord-191574-1g38scnj 121 30 for for IN cord-191574-1g38scnj 121 31 the the DT cord-191574-1g38scnj 121 32 Laplace Laplace NNP cord-191574-1g38scnj 121 33 transform transform NN cord-191574-1g38scnj 121 34 of of IN cord-191574-1g38scnj 121 35 u(t u(t NN cord-191574-1g38scnj 121 36 ) ) -RRB- cord-191574-1g38scnj 122 1 the the DT cord-191574-1g38scnj 122 2 equation equation NN cord-191574-1g38scnj 122 3 We -PRON- PRP cord-191574-1g38scnj 122 4 assume assume VBP cord-191574-1g38scnj 122 5 now now RB cord-191574-1g38scnj 122 6 that that IN cord-191574-1g38scnj 122 7 the the DT cord-191574-1g38scnj 122 8 function function NN cord-191574-1g38scnj 122 9 u(t u(t NN cord-191574-1g38scnj 122 10 ) ) -RRB- cord-191574-1g38scnj 122 11 can can MD cord-191574-1g38scnj 122 12 be be VB cord-191574-1g38scnj 122 13 represented represent VBN cord-191574-1g38scnj 122 14 in in IN cord-191574-1g38scnj 122 15 the the DT cord-191574-1g38scnj 122 16 form form NN cord-191574-1g38scnj 122 17 of of IN cord-191574-1g38scnj 122 18 an an DT cord-191574-1g38scnj 122 19 infinite infinite JJ cord-191574-1g38scnj 122 20 series series NN cord-191574-1g38scnj 122 21 , , , cord-191574-1g38scnj 122 22 where where WRB cord-191574-1g38scnj 122 23 all all PDT cord-191574-1g38scnj 122 24 the the DT cord-191574-1g38scnj 122 25 terms term NNS cord-191574-1g38scnj 122 26 v v NNP cord-191574-1g38scnj 122 27 n n NN cord-191574-1g38scnj 122 28 ( ( -LRB- cord-191574-1g38scnj 122 29 t t NNP cord-191574-1g38scnj 122 30 ) ) -RRB- cord-191574-1g38scnj 122 31 , , , cord-191574-1g38scnj 122 32 n n NN cord-191574-1g38scnj 122 33 = = SYM cord-191574-1g38scnj 122 34 0 0 CD cord-191574-1g38scnj 122 35 , , , cord-191574-1g38scnj 122 36 1 1 CD cord-191574-1g38scnj 122 37 , , , cord-191574-1g38scnj 122 38 2 2 CD cord-191574-1g38scnj 122 39 , , , cord-191574-1g38scnj 122 40 ... ... : cord-191574-1g38scnj 122 41 can can MD cord-191574-1g38scnj 122 42 be be VB cord-191574-1g38scnj 122 43 computed compute VBN cord-191574-1g38scnj 122 44 recursively recursively RB cord-191574-1g38scnj 122 45 . . . cord-191574-1g38scnj 123 1 As as IN cord-191574-1g38scnj 123 2 for for IN cord-191574-1g38scnj 123 3 the the DT cord-191574-1g38scnj 123 4 nonlinear nonlinear JJ cord-191574-1g38scnj 123 5 operator operator NN cord-191574-1g38scnj 123 6 f f NNP cord-191574-1g38scnj 123 7 ( ( -LRB- cord-191574-1g38scnj 123 8 u(t u(t NNP cord-191574-1g38scnj 123 9 ) ) -RRB- cord-191574-1g38scnj 123 10 ) ) -RRB- cord-191574-1g38scnj 124 1 = = NFP cord-191574-1g38scnj 125 1 e e LS cord-191574-1g38scnj 125 2 u(t u(t NNP cord-191574-1g38scnj 125 3 ) ) -RRB- cord-191574-1g38scnj 126 1 , , , cord-191574-1g38scnj 126 2 we -PRON- PRP cord-191574-1g38scnj 126 3 assume assume VBP cord-191574-1g38scnj 126 4 that that IN cord-191574-1g38scnj 126 5 it -PRON- PRP cord-191574-1g38scnj 126 6 can can MD cord-191574-1g38scnj 126 7 be be VB cord-191574-1g38scnj 126 8 decomposed decompose VBN cord-191574-1g38scnj 126 9 as as IN cord-191574-1g38scnj 126 10 where where WRB cord-191574-1g38scnj 126 11 A a DT cord-191574-1g38scnj 126 12 n n NN cord-191574-1g38scnj 126 13 ( ( -LRB- cord-191574-1g38scnj 126 14 t t NN cord-191574-1g38scnj 126 15 ) ) -RRB- cord-191574-1g38scnj 126 16 are be VBP cord-191574-1g38scnj 126 17 the the DT cord-191574-1g38scnj 126 18 Adomian adomian JJ cord-191574-1g38scnj 126 19 polynomials polynomial NNS cord-191574-1g38scnj 126 20 , , , cord-191574-1g38scnj 126 21 defined define VBN cord-191574-1g38scnj 126 22 according accord VBG cord-191574-1g38scnj 126 23 to to IN cord-191574-1g38scnj 126 24 Eq Eq NNP cord-191574-1g38scnj 126 25 . . . cord-191574-1g38scnj 127 1 ( ( -LRB- cord-191574-1g38scnj 127 2 22 22 CD cord-191574-1g38scnj 127 3 ) ) -RRB- cord-191574-1g38scnj 127 4 . . . cord-191574-1g38scnj 128 1 The the DT cord-191574-1g38scnj 128 2 first first JJ cord-191574-1g38scnj 128 3 five five CD cord-191574-1g38scnj 128 4 Adomian adomian JJ cord-191574-1g38scnj 128 5 polynomials polynomial NNS cord-191574-1g38scnj 128 6 can can MD cord-191574-1g38scnj 128 7 be be VB cord-191574-1g38scnj 128 8 obtained obtain VBN cord-191574-1g38scnj 128 9 in in IN cord-191574-1g38scnj 128 10 the the DT cord-191574-1g38scnj 128 11 following follow VBG cord-191574-1g38scnj 128 12 form form NN cord-191574-1g38scnj 128 13 , , , cord-191574-1g38scnj 128 14 Substituting substitute VBG cord-191574-1g38scnj 128 15 Eqs Eqs NNP cord-191574-1g38scnj 128 16 . . . cord-191574-1g38scnj 129 1 ( ( -LRB- cord-191574-1g38scnj 129 2 40 40 CD cord-191574-1g38scnj 129 3 ) ) -RRB- cord-191574-1g38scnj 129 4 and and CC cord-191574-1g38scnj 129 5 ( ( -LRB- cord-191574-1g38scnj 129 6 41 41 CD cord-191574-1g38scnj 129 7 ) ) -RRB- cord-191574-1g38scnj 129 8 into into IN cord-191574-1g38scnj 129 9 Eq Eq NNP cord-191574-1g38scnj 129 10 . . . cord-191574-1g38scnj 130 1 ( ( -LRB- cord-191574-1g38scnj 130 2 39 39 CD cord-191574-1g38scnj 130 3 ) ) -RRB- cord-191574-1g38scnj 130 4 we -PRON- PRP cord-191574-1g38scnj 130 5 obtain obtain VBP cord-191574-1g38scnj 130 6 The the DT cord-191574-1g38scnj 130 7 matching matching NN cord-191574-1g38scnj 130 8 of of IN cord-191574-1g38scnj 130 9 both both DT cord-191574-1g38scnj 130 10 sides side NNS cord-191574-1g38scnj 130 11 of of IN cord-191574-1g38scnj 130 12 Eq Eq NNP cord-191574-1g38scnj 130 13 . . . cord-191574-1g38scnj 131 1 ( ( -LRB- cord-191574-1g38scnj 131 2 47 47 CD cord-191574-1g38scnj 131 3 ) ) -RRB- cord-191574-1g38scnj 131 4 gives give VBZ cord-191574-1g38scnj 131 5 the the DT cord-191574-1g38scnj 131 6 following follow VBG cord-191574-1g38scnj 131 7 iterative iterative JJ cord-191574-1g38scnj 131 8 algorithm algorithm NN cord-191574-1g38scnj 131 9 for for IN cord-191574-1g38scnj 131 10 obtaining obtain VBG cord-191574-1g38scnj 131 11 the the DT cord-191574-1g38scnj 131 12 power power NNP cord-191574-1g38scnj 131 13 series series NN cord-191574-1g38scnj 131 14 solution solution NN cord-191574-1g38scnj 131 15 of of IN cord-191574-1g38scnj 131 16 the the DT cord-191574-1g38scnj 131 17 basic basic JJ cord-191574-1g38scnj 131 18 evolution evolution NN cord-191574-1g38scnj 131 19 equation equation NN cord-191574-1g38scnj 131 20 of of IN cord-191574-1g38scnj 131 21 the the DT cord-191574-1g38scnj 131 22 SIR SIR NNP cord-191574-1g38scnj 131 23 model model NN cord-191574-1g38scnj 131 24 with with IN cord-191574-1g38scnj 131 25 vital vital JJ cord-191574-1g38scnj 131 26 dynamics dynamic NNS cord-191574-1g38scnj 131 27 , , , cord-191574-1g38scnj 131 28 ... ... : cord-191574-1g38scnj 132 1 By by IN cord-191574-1g38scnj 132 2 applying apply VBG cord-191574-1g38scnj 132 3 the the DT cord-191574-1g38scnj 132 4 inverse inverse JJ cord-191574-1g38scnj 132 5 Laplace Laplace NNP cord-191574-1g38scnj 132 6 transformation transformation NN cord-191574-1g38scnj 132 7 to to IN cord-191574-1g38scnj 132 8 Eq Eq NNP cord-191574-1g38scnj 132 9 . . . cord-191574-1g38scnj 133 1 ( ( -LRB- cord-191574-1g38scnj 133 2 48 48 CD cord-191574-1g38scnj 133 3 ) ) -RRB- cord-191574-1g38scnj 133 4 , , , cord-191574-1g38scnj 133 5 we -PRON- PRP cord-191574-1g38scnj 133 6 obtain obtain VBP cord-191574-1g38scnj 133 7 the the DT cord-191574-1g38scnj 133 8 expression expression NN cord-191574-1g38scnj 133 9 of of IN cord-191574-1g38scnj 133 10 u u NNP cord-191574-1g38scnj 133 11 0 0 CD cord-191574-1g38scnj 133 12 ( ( -LRB- cord-191574-1g38scnj 133 13 t t NN cord-191574-1g38scnj 133 14 ) ) -RRB- cord-191574-1g38scnj 133 15 as as IN cord-191574-1g38scnj 133 16 We -PRON- PRP cord-191574-1g38scnj 133 17 expand expand VBP cord-191574-1g38scnj 133 18 the the DT cord-191574-1g38scnj 133 19 term term NN cord-191574-1g38scnj 133 20 ( ( -LRB- cord-191574-1g38scnj 134 1 β β NNP cord-191574-1g38scnj 134 2 N N NNP cord-191574-1g38scnj 134 3 3 3 CD cord-191574-1g38scnj 134 4 /µN /µN . cord-191574-1g38scnj 134 5 ) ) -RRB- cord-191574-1g38scnj 135 1 e e LS cord-191574-1g38scnj 135 2 −µt −µt NN cord-191574-1g38scnj 135 3 in in IN cord-191574-1g38scnj 135 4 power power NN cord-191574-1g38scnj 135 5 series series NN cord-191574-1g38scnj 135 6 , , , cord-191574-1g38scnj 135 7 and and CC cord-191574-1g38scnj 135 8 hence hence RB cord-191574-1g38scnj 135 9 in in IN cord-191574-1g38scnj 135 10 the the DT cord-191574-1g38scnj 135 11 first first JJ cord-191574-1g38scnj 135 12 order order NN cord-191574-1g38scnj 135 13 approximation approximation NN cord-191574-1g38scnj 135 14 we -PRON- PRP cord-191574-1g38scnj 135 15 obtain obtain VBP cord-191574-1g38scnj 136 1 The the DT cord-191574-1g38scnj 136 2 first first JJ cord-191574-1g38scnj 136 3 Adomian adomian JJ cord-191574-1g38scnj 136 4 polynomial polynomial NN cord-191574-1g38scnj 136 5 is be VBZ cord-191574-1g38scnj 136 6 given give VBN cord-191574-1g38scnj 136 7 by by IN cord-191574-1g38scnj 136 8 Therefore therefore RB cord-191574-1g38scnj 136 9 , , , cord-191574-1g38scnj 136 10 within within IN cord-191574-1g38scnj 136 11 the the DT cord-191574-1g38scnj 136 12 adopted adopt VBN cord-191574-1g38scnj 136 13 approximation approximation NN cord-191574-1g38scnj 136 14 , , , cord-191574-1g38scnj 136 15 we -PRON- PRP cord-191574-1g38scnj 136 16 immediately immediately RB cord-191574-1g38scnj 136 17 obtain obtain VBP cord-191574-1g38scnj 136 18 The the DT cord-191574-1g38scnj 136 19 second second JJ cord-191574-1g38scnj 136 20 Adomian adomian JJ cord-191574-1g38scnj 136 21 polynomial polynomial NN cord-191574-1g38scnj 136 22 is be VBZ cord-191574-1g38scnj 136 23 obtained obtain VBN cord-191574-1g38scnj 136 24 as as IN cord-191574-1g38scnj 136 25 and and CC cord-191574-1g38scnj 136 26 thus thus RB cord-191574-1g38scnj 136 27 we -PRON- PRP cord-191574-1g38scnj 136 28 find find VBP cord-191574-1g38scnj 136 29 Similarly similarly RB cord-191574-1g38scnj 136 30 , , , cord-191574-1g38scnj 136 31 after after IN cord-191574-1g38scnj 136 32 computing compute VBG cord-191574-1g38scnj 136 33 the the DT cord-191574-1g38scnj 136 34 third third JJ cord-191574-1g38scnj 136 35 Adomian adomian JJ cord-191574-1g38scnj 136 36 polynomial polynomial NN cord-191574-1g38scnj 136 37 , , , cord-191574-1g38scnj 136 38 given give VBN cord-191574-1g38scnj 136 39 by by IN cord-191574-1g38scnj 136 40 we -PRON- PRP cord-191574-1g38scnj 136 41 obtain obtain VBP cord-191574-1g38scnj 136 42 u u NNP cord-191574-1g38scnj 136 43 3 3 CD cord-191574-1g38scnj 136 44 ( ( -LRB- cord-191574-1g38scnj 136 45 t t NN cord-191574-1g38scnj 136 46 ) ) -RRB- cord-191574-1g38scnj 136 47 . . . cord-191574-1g38scnj 137 1 The the DT cord-191574-1g38scnj 137 2 higher high JJR cord-191574-1g38scnj 137 3 order order NN cord-191574-1g38scnj 137 4 terms term NNS cord-191574-1g38scnj 137 5 in in IN cord-191574-1g38scnj 137 6 the the DT cord-191574-1g38scnj 137 7 Laplace Laplace NNP cord-191574-1g38scnj 137 8 - - HYPH cord-191574-1g38scnj 137 9 Adomian adomian JJ cord-191574-1g38scnj 137 10 power power NN cord-191574-1g38scnj 137 11 series series NN cord-191574-1g38scnj 137 12 representation representation NN cord-191574-1g38scnj 137 13 of of IN cord-191574-1g38scnj 137 14 u(t u(t NNP cord-191574-1g38scnj 137 15 ) ) -RRB- cord-191574-1g38scnj 137 16 can can MD cord-191574-1g38scnj 137 17 be be VB cord-191574-1g38scnj 137 18 obtained obtain VBN cord-191574-1g38scnj 137 19 by by IN cord-191574-1g38scnj 137 20 following follow VBG cord-191574-1g38scnj 137 21 the the DT cord-191574-1g38scnj 137 22 same same JJ cord-191574-1g38scnj 137 23 approach approach NN cord-191574-1g38scnj 137 24 , , , cord-191574-1g38scnj 137 25 but but CC cord-191574-1g38scnj 137 26 due due IN cord-191574-1g38scnj 137 27 to to IN cord-191574-1g38scnj 137 28 their -PRON- PRP$ cord-191574-1g38scnj 137 29 length length NN cord-191574-1g38scnj 137 30 we -PRON- PRP cord-191574-1g38scnj 137 31 will will MD cord-191574-1g38scnj 137 32 not not RB cord-191574-1g38scnj 137 33 present present VB cord-191574-1g38scnj 137 34 them -PRON- PRP cord-191574-1g38scnj 137 35 here here RB cord-191574-1g38scnj 137 36 . . . cord-191574-1g38scnj 138 1 Hence hence RB cord-191574-1g38scnj 138 2 , , , cord-191574-1g38scnj 138 3 once once IN cord-191574-1g38scnj 138 4 the the DT cord-191574-1g38scnj 138 5 expressions expression NNS cord-191574-1g38scnj 138 6 of of IN cord-191574-1g38scnj 138 7 the the DT cord-191574-1g38scnj 138 8 terms term NNS cord-191574-1g38scnj 138 9 u u NNP cord-191574-1g38scnj 138 10 n n NN cord-191574-1g38scnj 138 11 ( ( -LRB- cord-191574-1g38scnj 138 12 t t NNP cord-191574-1g38scnj 138 13 ) ) -RRB- cord-191574-1g38scnj 138 14 , , , cord-191574-1g38scnj 138 15 n n NN cord-191574-1g38scnj 138 16 = = SYM cord-191574-1g38scnj 138 17 0 0 CD cord-191574-1g38scnj 138 18 , , , cord-191574-1g38scnj 138 19 1 1 CD cord-191574-1g38scnj 138 20 , , , cord-191574-1g38scnj 138 21 2 2 CD cord-191574-1g38scnj 138 22 , , , cord-191574-1g38scnj 138 23 .. .. NFP cord-191574-1g38scnj 138 24 in in IN cord-191574-1g38scnj 138 25 the the DT cord-191574-1g38scnj 138 26 Adomian adomian JJ cord-191574-1g38scnj 138 27 Decomposition decomposition NN cord-191574-1g38scnj 138 28 are be VBP cord-191574-1g38scnj 138 29 known know VBN cord-191574-1g38scnj 138 30 , , , cord-191574-1g38scnj 138 31 the the DT cord-191574-1g38scnj 138 32 approximate approximate JJ cord-191574-1g38scnj 138 33 semianalytical semianalytical JJ cord-191574-1g38scnj 138 34 solution solution NN cord-191574-1g38scnj 138 35 of of IN cord-191574-1g38scnj 138 36 the the DT cord-191574-1g38scnj 138 37 SIR SIR NNP cord-191574-1g38scnj 138 38 model model NN cord-191574-1g38scnj 138 39 with with IN cord-191574-1g38scnj 138 40 vital vital JJ cord-191574-1g38scnj 138 41 dynamics dynamic NNS cord-191574-1g38scnj 138 42 can can MD cord-191574-1g38scnj 138 43 be be VB cord-191574-1g38scnj 138 44 obtained obtain VBN cord-191574-1g38scnj 138 45 as as IN cord-191574-1g38scnj 138 46 The the DT cord-191574-1g38scnj 138 47 present present JJ cord-191574-1g38scnj 138 48 Laplace Laplace NNP cord-191574-1g38scnj 138 49 - - HYPH cord-191574-1g38scnj 138 50 Adomian adomian JJ cord-191574-1g38scnj 138 51 series series NN cord-191574-1g38scnj 138 52 solution solution NN cord-191574-1g38scnj 138 53 is be VBZ cord-191574-1g38scnj 138 54 valid valid JJ cord-191574-1g38scnj 138 55 only only RB cord-191574-1g38scnj 138 56 for for IN cord-191574-1g38scnj 138 57 some some DT cord-191574-1g38scnj 138 58 specific specific JJ cord-191574-1g38scnj 138 59 ranges range NNS cord-191574-1g38scnj 138 60 of of IN cord-191574-1g38scnj 138 61 the the DT cord-191574-1g38scnj 138 62 model model NN cord-191574-1g38scnj 138 63 parameters parameter NNS cord-191574-1g38scnj 138 64 ( ( -LRB- cord-191574-1g38scnj 138 65 β β NN cord-191574-1g38scnj 138 66 , , , cord-191574-1g38scnj 138 67 γ γ NN cord-191574-1g38scnj 138 68 , , , cord-191574-1g38scnj 138 69 µ µ NNP cord-191574-1g38scnj 138 70 ) ) -RRB- cord-191574-1g38scnj 138 71 and and CC cord-191574-1g38scnj 138 72 of of IN cord-191574-1g38scnj 138 73 initial initial JJ cord-191574-1g38scnj 138 74 conditions condition NNS cord-191574-1g38scnj 138 75 ( ( -LRB- cord-191574-1g38scnj 138 76 N N NNP cord-191574-1g38scnj 138 77 1 1 CD cord-191574-1g38scnj 138 78 , , , cord-191574-1g38scnj 138 79 N n CD cord-191574-1g38scnj 138 80 2 2 CD cord-191574-1g38scnj 138 81 , , , cord-191574-1g38scnj 138 82 N n CD cord-191574-1g38scnj 138 83 3 3 CD cord-191574-1g38scnj 138 84 ) ) -RRB- cord-191574-1g38scnj 138 85 . . . cord-191574-1g38scnj 139 1 If if IN cord-191574-1g38scnj 139 2 ( ( -LRB- cord-191574-1g38scnj 139 3 N n CD cord-191574-1g38scnj 139 4 1 1 CD cord-191574-1g38scnj 139 5 + + SYM cord-191574-1g38scnj 139 6 N n CD cord-191574-1g38scnj 139 7 2 2 CD cord-191574-1g38scnj 139 8 ) ) -RRB- cord-191574-1g38scnj 139 9 N n NN cord-191574-1g38scnj 139 10 > > XX cord-191574-1g38scnj 139 11 ( ( -LRB- cord-191574-1g38scnj 139 12 γ γ NN cord-191574-1g38scnj 139 13 + + CC cord-191574-1g38scnj 139 14 µ µ NN cord-191574-1g38scnj 139 15 ) ) -RRB- cord-191574-1g38scnj 139 16 /β /β NNP cord-191574-1g38scnj 139 17 , , , cord-191574-1g38scnj 139 18 or or CC cord-191574-1g38scnj 140 1 ( ( -LRB- cord-191574-1g38scnj 140 2 N n NN cord-191574-1g38scnj 140 3 1 1 CD cord-191574-1g38scnj 140 4 + + SYM cord-191574-1g38scnj 140 5 N n CD cord-191574-1g38scnj 140 6 2 2 CD cord-191574-1g38scnj 140 7 ) ) -RRB- cord-191574-1g38scnj 140 8 N n NN cord-191574-1g38scnj 140 9 > > XX cord-191574-1g38scnj 140 10 ( ( -LRB- cord-191574-1g38scnj 140 11 γ γ NN cord-191574-1g38scnj 140 12 + + SYM cord-191574-1g38scnj 140 13 2µ)/β 2µ)/β CD cord-191574-1g38scnj 140 14 , , , cord-191574-1g38scnj 140 15 the the DT cord-191574-1g38scnj 140 16 exponential exponential JJ cord-191574-1g38scnj 140 17 functions function NNS cord-191574-1g38scnj 140 18 in in IN cord-191574-1g38scnj 140 19 Eq Eq NNP cord-191574-1g38scnj 140 20 . . . cord-191574-1g38scnj 141 1 ( ( -LRB- cord-191574-1g38scnj 141 2 57 57 CD cord-191574-1g38scnj 141 3 ) ) -RRB- cord-191574-1g38scnj 141 4 do do VBP cord-191574-1g38scnj 141 5 diverge diverge VB cord-191574-1g38scnj 141 6 in in IN cord-191574-1g38scnj 141 7 the the DT cord-191574-1g38scnj 141 8 long long JJ cord-191574-1g38scnj 141 9 time time NN cord-191574-1g38scnj 141 10 limit limit NN cord-191574-1g38scnj 141 11 . . . cord-191574-1g38scnj 142 1 Similarly similarly RB cord-191574-1g38scnj 142 2 , , , cord-191574-1g38scnj 142 3 for for IN cord-191574-1g38scnj 142 4 N n CD cord-191574-1g38scnj 142 5 2 2 CD cord-191574-1g38scnj 142 6 ) ) -RRB- cord-191574-1g38scnj 142 7 , , , cord-191574-1g38scnj 142 8 singularities singularity NNS cord-191574-1g38scnj 142 9 develop develop VBP cord-191574-1g38scnj 142 10 in in IN cord-191574-1g38scnj 142 11 the the DT cord-191574-1g38scnj 142 12 Adomian adomian JJ cord-191574-1g38scnj 142 13 series series NN cord-191574-1g38scnj 142 14 . . . cord-191574-1g38scnj 143 1 In in IN cord-191574-1g38scnj 143 2 the the DT cord-191574-1g38scnj 143 3 present present JJ cord-191574-1g38scnj 143 4 Section section NN cord-191574-1g38scnj 143 5 we -PRON- PRP cord-191574-1g38scnj 143 6 compare compare VBP cord-191574-1g38scnj 143 7 the the DT cord-191574-1g38scnj 143 8 semianalytical semianalytical JJ cord-191574-1g38scnj 143 9 predictions prediction NNS cord-191574-1g38scnj 143 10 of of IN cord-191574-1g38scnj 143 11 the the DT cord-191574-1g38scnj 143 12 Adomian adomian JJ cord-191574-1g38scnj 143 13 and and CC cord-191574-1g38scnj 143 14 Laplace Laplace NNP cord-191574-1g38scnj 143 15 Adomian Adomian NNP cord-191574-1g38scnj 143 16 Decomposition Decomposition NNP cord-191574-1g38scnj 143 17 Methods Methods NNPS cord-191574-1g38scnj 143 18 as as IN cord-191574-1g38scnj 143 19 applied apply VBN cord-191574-1g38scnj 143 20 to to IN cord-191574-1g38scnj 143 21 the the DT cord-191574-1g38scnj 143 22 SIR SIR NNP cord-191574-1g38scnj 143 23 model model NN cord-191574-1g38scnj 143 24 with with IN cord-191574-1g38scnj 143 25 vital vital JJ cord-191574-1g38scnj 143 26 dynamics dynamic NNS cord-191574-1g38scnj 143 27 with with IN cord-191574-1g38scnj 143 28 the the DT cord-191574-1g38scnj 143 29 exact exact JJ cord-191574-1g38scnj 143 30 numerical numerical JJ cord-191574-1g38scnj 143 31 solutions solution NNS cord-191574-1g38scnj 143 32 , , , cord-191574-1g38scnj 143 33 obtained obtain VBN cord-191574-1g38scnj 143 34 by by IN cord-191574-1g38scnj 143 35 numerically numerically RB cord-191574-1g38scnj 143 36 integrating integrate VBG cord-191574-1g38scnj 143 37 the the DT cord-191574-1g38scnj 143 38 system system NN cord-191574-1g38scnj 143 39 of of IN cord-191574-1g38scnj 143 40 equations equation NNS cord-191574-1g38scnj 143 41 ( ( -LRB- cord-191574-1g38scnj 143 42 3)-(5 3)-(5 CD cord-191574-1g38scnj 143 43 ) ) -RRB- cord-191574-1g38scnj 143 44 . . . cord-191574-1g38scnj 144 1 In in IN cord-191574-1g38scnj 144 2 the the DT cord-191574-1g38scnj 144 3 case case NN cord-191574-1g38scnj 144 4 of of IN cord-191574-1g38scnj 144 5 the the DT cord-191574-1g38scnj 144 6 Adomian adomian JJ cord-191574-1g38scnj 144 7 Decomposition Decomposition NNP cord-191574-1g38scnj 144 8 Method Method NNP cord-191574-1g38scnj 144 9 we -PRON- PRP cord-191574-1g38scnj 144 10 will will MD cord-191574-1g38scnj 144 11 approximate approximate VB cord-191574-1g38scnj 144 12 the the DT cord-191574-1g38scnj 144 13 solution solution NN cord-191574-1g38scnj 144 14 by by IN cord-191574-1g38scnj 144 15 using use VBG cord-191574-1g38scnj 144 16 only only RB cord-191574-1g38scnj 144 17 two two CD cord-191574-1g38scnj 144 18 first first JJ cord-191574-1g38scnj 144 19 two two CD cord-191574-1g38scnj 144 20 terms term NNS cord-191574-1g38scnj 144 21 in in IN cord-191574-1g38scnj 144 22 the the DT cord-191574-1g38scnj 144 23 Adomian adomian JJ cord-191574-1g38scnj 144 24 iterative iterative JJ cord-191574-1g38scnj 144 25 scheme scheme NN cord-191574-1g38scnj 144 26 . . . cord-191574-1g38scnj 145 1 However however RB cord-191574-1g38scnj 145 2 , , , cord-191574-1g38scnj 145 3 we -PRON- PRP cord-191574-1g38scnj 145 4 will will MD cord-191574-1g38scnj 145 5 also also RB cord-191574-1g38scnj 145 6 add add VB cord-191574-1g38scnj 145 7 to to IN cord-191574-1g38scnj 145 8 the the DT cord-191574-1g38scnj 145 9 series series NN cord-191574-1g38scnj 145 10 solution solution NN cord-191574-1g38scnj 145 11 a a DT cord-191574-1g38scnj 145 12 truncation truncation NN cord-191574-1g38scnj 145 13 of of IN cord-191574-1g38scnj 145 14 the the DT cord-191574-1g38scnj 145 15 term term NN cord-191574-1g38scnj 145 16 u u NNP cord-191574-1g38scnj 145 17 2 2 CD cord-191574-1g38scnj 145 18 , , , cord-191574-1g38scnj 145 19 approximated approximate VBN cord-191574-1g38scnj 145 20 by by IN cord-191574-1g38scnj 145 21 u u NNP cord-191574-1g38scnj 145 22 2 2 CD cord-191574-1g38scnj 146 1 ( ( -LRB- cord-191574-1g38scnj 146 2 t t NN cord-191574-1g38scnj 146 3 ) ) -RRB- cord-191574-1g38scnj 146 4 ≈ ≈ NNP cord-191574-1g38scnj 146 5 −µ −µ NNS cord-191574-1g38scnj 147 1 t t NNP cord-191574-1g38scnj 147 2 0 0 CD cord-191574-1g38scnj 147 3 u u NNP cord-191574-1g38scnj 147 4 1 1 CD cord-191574-1g38scnj 147 5 ( ( -LRB- cord-191574-1g38scnj 147 6 t)dt t)dt XX cord-191574-1g38scnj 147 7 . . . cord-191574-1g38scnj 148 1 Hence hence RB cord-191574-1g38scnj 148 2 we -PRON- PRP cord-191574-1g38scnj 148 3 approximate approximate VBP cord-191574-1g38scnj 148 4 the the DT cord-191574-1g38scnj 148 5 Adomian adomian JJ cord-191574-1g38scnj 148 6 solution solution NN cord-191574-1g38scnj 148 7 of of IN cord-191574-1g38scnj 148 8 the the DT cord-191574-1g38scnj 148 9 basic basic JJ cord-191574-1g38scnj 148 10 evolution evolution NN cord-191574-1g38scnj 148 11 equation equation NN cord-191574-1g38scnj 148 12 of of IN cord-191574-1g38scnj 148 13 the the DT cord-191574-1g38scnj 148 14 SIR SIR NNP cord-191574-1g38scnj 148 15 model model NN cord-191574-1g38scnj 148 16 with with IN cord-191574-1g38scnj 148 17 vital vital JJ cord-191574-1g38scnj 148 18 dynamics dynamic NNS cord-191574-1g38scnj 148 19 as as IN cord-191574-1g38scnj 148 20 The the DT cord-191574-1g38scnj 148 21 comparison comparison NN cord-191574-1g38scnj 148 22 of of IN cord-191574-1g38scnj 148 23 the the DT cord-191574-1g38scnj 148 24 numerical numerical JJ cord-191574-1g38scnj 148 25 and and CC cord-191574-1g38scnj 148 26 of of IN cord-191574-1g38scnj 148 27 the the DT cord-191574-1g38scnj 148 28 semianalytical semianalytical JJ cord-191574-1g38scnj 148 29 Adomian adomian JJ cord-191574-1g38scnj 148 30 approximate approximate JJ cord-191574-1g38scnj 148 31 solution solution NN cord-191574-1g38scnj 148 32 is be VBZ cord-191574-1g38scnj 148 33 presented present VBN cord-191574-1g38scnj 148 34 , , , cord-191574-1g38scnj 148 35 for for IN cord-191574-1g38scnj 148 36 different different JJ cord-191574-1g38scnj 148 37 values value NNS cord-191574-1g38scnj 148 38 of of IN cord-191574-1g38scnj 148 39 the the DT cord-191574-1g38scnj 148 40 model model NN cord-191574-1g38scnj 148 41 parameters parameter VBZ cord-191574-1g38scnj 148 42 β β NNP cord-191574-1g38scnj 148 43 , , , cord-191574-1g38scnj 148 44 γ γ NN cord-191574-1g38scnj 148 45 and and CC cord-191574-1g38scnj 148 46 µ µ NN cord-191574-1g38scnj 148 47 in in IN cord-191574-1g38scnj 148 48 Fig Fig NNP cord-191574-1g38scnj 148 49 . . NNP cord-191574-1g38scnj 148 50 1 1 CD cord-191574-1g38scnj 148 51 . . . cord-191574-1g38scnj 149 1 ( ( -LRB- cord-191574-1g38scnj 149 2 or or CC cord-191574-1g38scnj 149 3 a a DT cord-191574-1g38scnj 149 4 vaccine vaccine NN cord-191574-1g38scnj 149 5 ) ) -RRB- cord-191574-1g38scnj 149 6 for for IN cord-191574-1g38scnj 149 7 it -PRON- PRP cord-191574-1g38scnj 149 8 is be VBZ cord-191574-1g38scnj 149 9 mostly mostly RB cord-191574-1g38scnj 149 10 a a DT cord-191574-1g38scnj 149 11 medical medical JJ cord-191574-1g38scnj 149 12 / / SYM cord-191574-1g38scnj 149 13 biological biological JJ cord-191574-1g38scnj 149 14 / / SYM cord-191574-1g38scnj 149 15 virusological virusological NN cord-191574-1g38scnj 149 16 problem problem NN cord-191574-1g38scnj 149 17 , , , cord-191574-1g38scnj 149 18 the the DT cord-191574-1g38scnj 149 19 understanding understanding NN cord-191574-1g38scnj 149 20 of of IN cord-191574-1g38scnj 149 21 the the DT cord-191574-1g38scnj 149 22 spread spread NN cord-191574-1g38scnj 149 23 of of IN cord-191574-1g38scnj 149 24 the the DT cord-191574-1g38scnj 149 25 epidemics epidemic NNS cord-191574-1g38scnj 149 26 may may MD cord-191574-1g38scnj 149 27 lead lead VB cord-191574-1g38scnj 149 28 to to IN cord-191574-1g38scnj 149 29 the the DT cord-191574-1g38scnj 149 30 adoption adoption NN cord-191574-1g38scnj 149 31 / / SYM cord-191574-1g38scnj 149 32 imposition imposition NN cord-191574-1g38scnj 149 33 of of IN cord-191574-1g38scnj 149 34 quarantine quarantine NN cord-191574-1g38scnj 149 35 or or CC cord-191574-1g38scnj 149 36 safety safety NN cord-191574-1g38scnj 149 37 measures measure NNS cord-191574-1g38scnj 149 38 that that WDT cord-191574-1g38scnj 149 39 could could MD cord-191574-1g38scnj 149 40 drastically drastically RB cord-191574-1g38scnj 149 41 reduce reduce VB cord-191574-1g38scnj 149 42 its -PRON- PRP$ cord-191574-1g38scnj 149 43 intensity intensity NN cord-191574-1g38scnj 149 44 . . . cord-191574-1g38scnj 150 1 In in IN cord-191574-1g38scnj 150 2 this this DT cord-191574-1g38scnj 150 3 context context NN cord-191574-1g38scnj 150 4 the the DT cord-191574-1g38scnj 150 5 mathematical mathematical JJ cord-191574-1g38scnj 150 6 epidemiological epidemiological JJ cord-191574-1g38scnj 150 7 models model NNS cord-191574-1g38scnj 150 8 could could MD cord-191574-1g38scnj 150 9 play play VB cord-191574-1g38scnj 150 10 an an DT cord-191574-1g38scnj 150 11 important important JJ cord-191574-1g38scnj 150 12 role role NN cord-191574-1g38scnj 150 13 , , , cord-191574-1g38scnj 150 14 since since IN cord-191574-1g38scnj 150 15 a a DT cord-191574-1g38scnj 150 16 successful successful JJ cord-191574-1g38scnj 150 17 modeling modeling NN cord-191574-1g38scnj 150 18 of of IN cord-191574-1g38scnj 150 19 the the DT cord-191574-1g38scnj 150 20 spread spread NN cord-191574-1g38scnj 150 21 of of IN cord-191574-1g38scnj 150 22 the the DT cord-191574-1g38scnj 150 23 disease disease NN cord-191574-1g38scnj 150 24 could could MD cord-191574-1g38scnj 150 25 essentially essentially RB cord-191574-1g38scnj 150 26 contribute contribute VB cord-191574-1g38scnj 150 27 , , , cord-191574-1g38scnj 150 28 on on IN cord-191574-1g38scnj 150 29 the the DT cord-191574-1g38scnj 150 30 level level NN cord-191574-1g38scnj 150 31 of of IN cord-191574-1g38scnj 150 32 the the DT cord-191574-1g38scnj 150 33 society society NN cord-191574-1g38scnj 150 34 , , , cord-191574-1g38scnj 150 35 to to IN cord-191574-1g38scnj 150 36 the the DT cord-191574-1g38scnj 150 37 implementation implementation NN cord-191574-1g38scnj 150 38 of of IN cord-191574-1g38scnj 150 39 the the DT cord-191574-1g38scnj 150 40 best good JJS cord-191574-1g38scnj 150 41 policies policy NNS cord-191574-1g38scnj 150 42 that that WDT cord-191574-1g38scnj 150 43 could could MD cord-191574-1g38scnj 150 44 guarantee guarantee VB cord-191574-1g38scnj 150 45 the the DT cord-191574-1g38scnj 150 46 maximal maximal JJ cord-191574-1g38scnj 150 47 safety safety NN cord-191574-1g38scnj 150 48 of of IN cord-191574-1g38scnj 150 49 the the DT cord-191574-1g38scnj 150 50 citizens citizen NNS cord-191574-1g38scnj 150 51 . . . cord-191574-1g38scnj 151 1 Despite despite IN cord-191574-1g38scnj 151 2 their -PRON- PRP$ cord-191574-1g38scnj 151 3 ( ( -LRB- cord-191574-1g38scnj 151 4 apparent apparent JJ cord-191574-1g38scnj 151 5 ) ) -RRB- cord-191574-1g38scnj 151 6 mathematical mathematical JJ cord-191574-1g38scnj 151 7 simplicity simplicity NN cord-191574-1g38scnj 151 8 , , , cord-191574-1g38scnj 151 9 the the DT cord-191574-1g38scnj 151 10 compartmental compartmental JJ cord-191574-1g38scnj 151 11 epidemiological epidemiological JJ cord-191574-1g38scnj 151 12 models model NNS cord-191574-1g38scnj 151 13 did do VBD cord-191574-1g38scnj 151 14 play play VB cord-191574-1g38scnj 151 15 an an DT cord-191574-1g38scnj 151 16 important important JJ cord-191574-1g38scnj 151 17 role role NN cord-191574-1g38scnj 151 18 in in IN cord-191574-1g38scnj 151 19 the the DT cord-191574-1g38scnj 151 20 analysis analysis NN cord-191574-1g38scnj 151 21 of of IN cord-191574-1g38scnj 151 22 the the DT cord-191574-1g38scnj 151 23 Covid covid JJ cord-191574-1g38scnj 151 24 pandemic pandemic NN cord-191574-1g38scnj 151 25 . . . cord-191574-1g38scnj 152 1 These these DT cord-191574-1g38scnj 152 2 models model NNS cord-191574-1g38scnj 152 3 contain contain VBP cord-191574-1g38scnj 152 4 the the DT cord-191574-1g38scnj 152 5 basic basic JJ cord-191574-1g38scnj 152 6 features feature NNS cord-191574-1g38scnj 152 7 of of IN cord-191574-1g38scnj 152 8 the the DT cord-191574-1g38scnj 152 9 evolution evolution NN cord-191574-1g38scnj 152 10 of of IN cord-191574-1g38scnj 152 11 an an DT cord-191574-1g38scnj 152 12 epidemics epidemic NNS cord-191574-1g38scnj 152 13 , , , cord-191574-1g38scnj 152 14 and and CC cord-191574-1g38scnj 152 15 once once IN cord-191574-1g38scnj 152 16 the the DT cord-191574-1g38scnj 152 17 parameters parameter NNS cord-191574-1g38scnj 152 18 of of IN cord-191574-1g38scnj 152 19 the the DT cord-191574-1g38scnj 152 20 model model NN cord-191574-1g38scnj 152 21 are be VBP cord-191574-1g38scnj 152 22 fixed fix VBN cord-191574-1g38scnj 152 23 from from IN cord-191574-1g38scnj 152 24 the the DT cord-191574-1g38scnj 152 25 epidemiological epidemiological JJ cord-191574-1g38scnj 152 26 data datum NNS cord-191574-1g38scnj 152 27 they -PRON- PRP cord-191574-1g38scnj 152 28 can can MD cord-191574-1g38scnj 152 29 provide provide VB cord-191574-1g38scnj 152 30 some some DT cord-191574-1g38scnj 152 31 accurate accurate JJ cord-191574-1g38scnj 152 32 predictions prediction NNS cord-191574-1g38scnj 152 33 for for IN cord-191574-1g38scnj 152 34 the the DT cord-191574-1g38scnj 152 35 evolution evolution NN cord-191574-1g38scnj 152 36 of of IN cord-191574-1g38scnj 152 37 the the DT cord-191574-1g38scnj 152 38 infectious infectious JJ cord-191574-1g38scnj 152 39 diseases disease NNS cord-191574-1g38scnj 152 40 . . . cord-191574-1g38scnj 153 1 From from IN cord-191574-1g38scnj 153 2 a a DT cord-191574-1g38scnj 153 3 mathematical mathematical JJ cord-191574-1g38scnj 153 4 point point NN cord-191574-1g38scnj 153 5 of of IN cord-191574-1g38scnj 153 6 view view NN cord-191574-1g38scnj 153 7 the the DT cord-191574-1g38scnj 153 8 SIR SIR NNP cord-191574-1g38scnj 153 9 model model NN cord-191574-1g38scnj 153 10 is be VBZ cord-191574-1g38scnj 153 11 exactly exactly RB cord-191574-1g38scnj 153 12 integrable integrable JJ cord-191574-1g38scnj 153 13 , , , cord-191574-1g38scnj 153 14 which which WDT cord-191574-1g38scnj 153 15 simplifies simplify VBZ cord-191574-1g38scnj 153 16 its -PRON- PRP$ cord-191574-1g38scnj 153 17 analysis analysis NN cord-191574-1g38scnj 153 18 , , , cord-191574-1g38scnj 153 19 since since IN cord-191574-1g38scnj 153 20 its -PRON- PRP$ cord-191574-1g38scnj 153 21 exact exact JJ cord-191574-1g38scnj 153 22 solution solution NN cord-191574-1g38scnj 153 23 is be VBZ cord-191574-1g38scnj 153 24 known know VBN cord-191574-1g38scnj 153 25 [ [ -LRB- cord-191574-1g38scnj 153 26 25 25 CD cord-191574-1g38scnj 153 27 ] ] -RRB- cord-191574-1g38scnj 153 28 . . . cord-191574-1g38scnj 154 1 On on IN cord-191574-1g38scnj 154 2 the the DT cord-191574-1g38scnj 154 3 other other JJ cord-191574-1g38scnj 154 4 hand hand NN cord-191574-1g38scnj 154 5 the the DT cord-191574-1g38scnj 154 6 SIR SIR NNP cord-191574-1g38scnj 154 7 model model NN cord-191574-1g38scnj 154 8 with with IN cord-191574-1g38scnj 154 9 vital vital JJ cord-191574-1g38scnj 154 10 dynamics dynamic NNS cord-191574-1g38scnj 154 11 is be VBZ cord-191574-1g38scnj 154 12 non non JJ cord-191574-1g38scnj 154 13 - - JJ cord-191574-1g38scnj 154 14 integrable integrable JJ cord-191574-1g38scnj 154 15 , , , cord-191574-1g38scnj 154 16 and and CC cord-191574-1g38scnj 154 17 therefore therefore RB cord-191574-1g38scnj 154 18 it -PRON- PRP cord-191574-1g38scnj 154 19 can can MD cord-191574-1g38scnj 154 20 be be VB cord-191574-1g38scnj 154 21 investigated investigate VBN cord-191574-1g38scnj 154 22 only only RB cord-191574-1g38scnj 154 23 by by IN cord-191574-1g38scnj 154 24 using use VBG cord-191574-1g38scnj 154 25 numerical numerical JJ cord-191574-1g38scnj 154 26 or or CC cord-191574-1g38scnj 154 27 semianalytical semianalytical JJ cord-191574-1g38scnj 154 28 methods method NNS cord-191574-1g38scnj 154 29 . . . cord-191574-1g38scnj 155 1 In in IN cord-191574-1g38scnj 155 2 the the DT cord-191574-1g38scnj 155 3 present present JJ cord-191574-1g38scnj 155 4 paper paper NN cord-191574-1g38scnj 155 5 we -PRON- PRP cord-191574-1g38scnj 155 6 have have VBP cord-191574-1g38scnj 155 7 introduced introduce VBN cord-191574-1g38scnj 155 8 the the DT cord-191574-1g38scnj 155 9 powerful powerful JJ cord-191574-1g38scnj 155 10 Adomian Adomian NNP cord-191574-1g38scnj 155 11 and and CC cord-191574-1g38scnj 155 12 Laplace Laplace NNP cord-191574-1g38scnj 155 13 - - HYPH cord-191574-1g38scnj 155 14 Adomian Adomian NNP cord-191574-1g38scnj 155 15 Decomposition decomposition NN cord-191574-1g38scnj 155 16 Methods Methods NNPS cord-191574-1g38scnj 155 17 for for IN cord-191574-1g38scnj 155 18 the the DT cord-191574-1g38scnj 155 19 study study NN cord-191574-1g38scnj 155 20 of of IN cord-191574-1g38scnj 155 21 this this DT cord-191574-1g38scnj 155 22 model model NN cord-191574-1g38scnj 155 23 . . . cord-191574-1g38scnj 156 1 However however RB cord-191574-1g38scnj 156 2 , , , cord-191574-1g38scnj 156 3 in in IN cord-191574-1g38scnj 156 4 obtaining obtain VBG cord-191574-1g38scnj 156 5 the the DT cord-191574-1g38scnj 156 6 explicit explicit JJ cord-191574-1g38scnj 156 7 form form NN cord-191574-1g38scnj 156 8 of of IN cord-191574-1g38scnj 156 9 the the DT cord-191574-1g38scnj 156 10 Adomian adomian JJ cord-191574-1g38scnj 156 11 polynomials polynomial NNS cord-191574-1g38scnj 156 12 one one PRP cord-191574-1g38scnj 156 13 must must MD cord-191574-1g38scnj 156 14 use use VB cord-191574-1g38scnj 156 15 some some DT cord-191574-1g38scnj 156 16 approximations approximation NNS cord-191574-1g38scnj 156 17 for for IN cord-191574-1g38scnj 156 18 their -PRON- PRP$ cord-191574-1g38scnj 156 19 estimation estimation NN cord-191574-1g38scnj 156 20 . . . cord-191574-1g38scnj 157 1 In in IN cord-191574-1g38scnj 157 2 the the DT cord-191574-1g38scnj 157 3 present present JJ cord-191574-1g38scnj 157 4 approach approach NN cord-191574-1g38scnj 157 5 we -PRON- PRP cord-191574-1g38scnj 157 6 have have VBP cord-191574-1g38scnj 157 7 approximated approximate VBN cord-191574-1g38scnj 157 8 the the DT cord-191574-1g38scnj 157 9 u u NNP cord-191574-1g38scnj 157 10 0 0 CD cord-191574-1g38scnj 157 11 ( ( -LRB- cord-191574-1g38scnj 157 12 t t NN cord-191574-1g38scnj 157 13 ) ) -RRB- cord-191574-1g38scnj 157 14 term term NN cord-191574-1g38scnj 157 15 by by IN cord-191574-1g38scnj 157 16 its -PRON- PRP$ cord-191574-1g38scnj 157 17 first first JJ cord-191574-1g38scnj 157 18 order order NN cord-191574-1g38scnj 157 19 series series NN cord-191574-1g38scnj 157 20 expansion expansion NN cord-191574-1g38scnj 157 21 , , , cord-191574-1g38scnj 157 22 leading lead VBG cord-191574-1g38scnj 157 23 to to IN cord-191574-1g38scnj 157 24 the the DT cord-191574-1g38scnj 157 25 first first JJ cord-191574-1g38scnj 157 26 Adomian adomian JJ cord-191574-1g38scnj 157 27 polynomial polynomial NN cord-191574-1g38scnj 157 28 as as IN cord-191574-1g38scnj 157 29 given give VBN cord-191574-1g38scnj 157 30 by by IN cord-191574-1g38scnj 157 31 Eq Eq NNP cord-191574-1g38scnj 157 32 . . . cord-191574-1g38scnj 158 1 ( ( -LRB- cord-191574-1g38scnj 158 2 54 54 CD cord-191574-1g38scnj 158 3 ) ) -RRB- cord-191574-1g38scnj 158 4 . . . cord-191574-1g38scnj 159 1 In in IN cord-191574-1g38scnj 159 2 the the DT cord-191574-1g38scnj 159 3 large large JJ cord-191574-1g38scnj 159 4 time time NN cord-191574-1g38scnj 159 5 limit limit NN cord-191574-1g38scnj 159 6 if if IN cord-191574-1g38scnj 159 7 β β NNP cord-191574-1g38scnj 159 8 ( ( -LRB- cord-191574-1g38scnj 159 9 N n NN cord-191574-1g38scnj 159 10 1 1 CD cord-191574-1g38scnj 160 1 + + CC cord-191574-1g38scnj 161 1 N n CD cord-191574-1g38scnj 161 2 2 2 CD cord-191574-1g38scnj 161 3 ) ) -RRB- cord-191574-1g38scnj 161 4 /N /N . cord-191574-1g38scnj 161 5 > > XX cord-191574-1g38scnj 161 6 γ γ NN cord-191574-1g38scnj 161 7 + + CC cord-191574-1g38scnj 161 8 µ µ NN cord-191574-1g38scnj 161 9 , , , cord-191574-1g38scnj 161 10 A a DT cord-191574-1g38scnj 161 11 0 0 CD cord-191574-1g38scnj 161 12 diverges diverge VBZ cord-191574-1g38scnj 161 13 . . . cord-191574-1g38scnj 162 1 Hence hence RB cord-191574-1g38scnj 162 2 the the DT cord-191574-1g38scnj 162 3 Laplace Laplace NNP cord-191574-1g38scnj 162 4 - - HYPH cord-191574-1g38scnj 162 5 Adomian Adomian NNP cord-191574-1g38scnj 162 6 Decomposition Decomposition NNP cord-191574-1g38scnj 162 7 Method Method NNP cord-191574-1g38scnj 162 8 works work VBZ cord-191574-1g38scnj 162 9 in in IN cord-191574-1g38scnj 162 10 the the DT cord-191574-1g38scnj 162 11 present present JJ cord-191574-1g38scnj 162 12 case case NN cord-191574-1g38scnj 162 13 optimally optimally RB cord-191574-1g38scnj 162 14 if if IN cord-191574-1g38scnj 162 15 the the DT cord-191574-1g38scnj 162 16 condition condition NN cord-191574-1g38scnj 162 17 ( ( -LRB- cord-191574-1g38scnj 162 18 N N NNP cord-191574-1g38scnj 162 19 1 1 CD cord-191574-1g38scnj 162 20 + + SYM cord-191574-1g38scnj 162 21 N n CD cord-191574-1g38scnj 162 22 2 2 CD cord-191574-1g38scnj 162 23 ) ) -RRB- cord-191574-1g38scnj 162 24 /N /N . cord-191574-1g38scnj 162 25 < < XX cord-191574-1g38scnj 162 26 ( ( -LRB- cord-191574-1g38scnj 162 27 γ γ NN cord-191574-1g38scnj 162 28 + + CC cord-191574-1g38scnj 162 29 µ)/β µ)/β NNS cord-191574-1g38scnj 162 30 . . . cord-191574-1g38scnj 163 1 In in IN cord-191574-1g38scnj 163 2 the the DT cord-191574-1g38scnj 163 3 present present JJ cord-191574-1g38scnj 163 4 paper paper NN cord-191574-1g38scnj 163 5 we -PRON- PRP cord-191574-1g38scnj 163 6 have have VBP cord-191574-1g38scnj 163 7 presented present VBN cord-191574-1g38scnj 163 8 a a DT cord-191574-1g38scnj 163 9 series series NN cord-191574-1g38scnj 163 10 solution solution NN cord-191574-1g38scnj 163 11 of of IN cord-191574-1g38scnj 163 12 the the DT cord-191574-1g38scnj 163 13 non non JJ cord-191574-1g38scnj 163 14 - - JJ cord-191574-1g38scnj 163 15 integrable integrable JJ cord-191574-1g38scnj 163 16 SIR SIR NNP cord-191574-1g38scnj 163 17 epidemiological epidemiological JJ cord-191574-1g38scnj 163 18 model model NN cord-191574-1g38scnj 163 19 with with IN cord-191574-1g38scnj 163 20 vital vital JJ cord-191574-1g38scnj 163 21 dynamics dynamic NNS cord-191574-1g38scnj 163 22 , , , cord-191574-1g38scnj 163 23 by by IN cord-191574-1g38scnj 163 24 using use VBG cord-191574-1g38scnj 163 25 both both CC cord-191574-1g38scnj 163 26 the the DT cord-191574-1g38scnj 163 27 Adomian adomian JJ cord-191574-1g38scnj 163 28 and and CC cord-191574-1g38scnj 163 29 the the DT cord-191574-1g38scnj 163 30 Laplace Laplace NNP cord-191574-1g38scnj 163 31 - - HYPH cord-191574-1g38scnj 163 32 Adomian Adomian NNP cord-191574-1g38scnj 163 33 Decomposition decomposition NN cord-191574-1g38scnj 163 34 Methods Methods NNPS cord-191574-1g38scnj 163 35 . . . cord-191574-1g38scnj 164 1 The the DT cord-191574-1g38scnj 164 2 application application NN cord-191574-1g38scnj 164 3 of of IN cord-191574-1g38scnj 164 4 these these DT cord-191574-1g38scnj 164 5 methods method NNS cord-191574-1g38scnj 164 6 allows allow VBZ cord-191574-1g38scnj 164 7 to to TO cord-191574-1g38scnj 164 8 obtain obtain VB cord-191574-1g38scnj 164 9 the the DT cord-191574-1g38scnj 164 10 explicit explicit JJ cord-191574-1g38scnj 164 11 time time NN cord-191574-1g38scnj 164 12 dependencies dependency NNS cord-191574-1g38scnj 164 13 of of IN cord-191574-1g38scnj 164 14 x(t x(t NNP cord-191574-1g38scnj 164 15 ) ) -RRB- cord-191574-1g38scnj 164 16 , , , cord-191574-1g38scnj 164 17 y(t y(t NN cord-191574-1g38scnj 164 18 ) ) -RRB- cord-191574-1g38scnj 164 19 and and CC cord-191574-1g38scnj 164 20 z(t z(t CD cord-191574-1g38scnj 164 21 ) ) -RRB- cord-191574-1g38scnj 164 22 . . . cord-191574-1g38scnj 165 1 The the DT cord-191574-1g38scnj 165 2 semianalytical semianalytical JJ cord-191574-1g38scnj 165 3 solutions solution NNS cord-191574-1g38scnj 165 4 have have VBP cord-191574-1g38scnj 165 5 a a DT cord-191574-1g38scnj 165 6 simple simple JJ cord-191574-1g38scnj 165 7 mathematical mathematical JJ cord-191574-1g38scnj 165 8 form form NN cord-191574-1g38scnj 165 9 , , , cord-191574-1g38scnj 165 10 and and CC cord-191574-1g38scnj 165 11 they -PRON- PRP cord-191574-1g38scnj 165 12 describes describe VBZ cord-191574-1g38scnj 165 13 very very RB cord-191574-1g38scnj 165 14 precisely precisely RB cord-191574-1g38scnj 165 15 the the DT cord-191574-1g38scnj 165 16 numerical numerical JJ cord-191574-1g38scnj 165 17 behavior behavior NN cord-191574-1g38scnj 165 18 of of IN cord-191574-1g38scnj 165 19 the the DT cord-191574-1g38scnj 165 20 model model NN cord-191574-1g38scnj 165 21 for for IN cord-191574-1g38scnj 165 22 a a DT cord-191574-1g38scnj 165 23 large large JJ cord-191574-1g38scnj 165 24 range range NN cord-191574-1g38scnj 165 25 of of IN cord-191574-1g38scnj 165 26 the the DT cord-191574-1g38scnj 165 27 model model NN cord-191574-1g38scnj 165 28 parameters parameter NNS cord-191574-1g38scnj 165 29 ( ( -LRB- cord-191574-1g38scnj 165 30 β β NN cord-191574-1g38scnj 165 31 , , , cord-191574-1g38scnj 165 32 γ γ NN cord-191574-1g38scnj 165 33 , , , cord-191574-1g38scnj 165 34 µ µ NNP cord-191574-1g38scnj 165 35 ) ) -RRB- cord-191574-1g38scnj 165 36 . . . cord-191574-1g38scnj 166 1 The the DT cord-191574-1g38scnj 166 2 time time NN cord-191574-1g38scnj 166 3 dependence dependence NN cord-191574-1g38scnj 166 4 of of IN cord-191574-1g38scnj 166 5 the the DT cord-191574-1g38scnj 166 6 three three CD cord-191574-1g38scnj 166 7 compartments compartment NNS cord-191574-1g38scnj 166 8 in in IN cord-191574-1g38scnj 166 9 the the DT cord-191574-1g38scnj 166 10 semianalytical semianalytical JJ cord-191574-1g38scnj 166 11 solution solution NN cord-191574-1g38scnj 166 12 obtained obtain VBN cord-191574-1g38scnj 166 13 by by IN cord-191574-1g38scnj 166 14 using use VBG cord-191574-1g38scnj 166 15 the the DT cord-191574-1g38scnj 166 16 Laplace Laplace NNP cord-191574-1g38scnj 166 17 - - HYPH cord-191574-1g38scnj 166 18 Adomian Adomian NNP cord-191574-1g38scnj 166 19 Decomposition Decomposition NNP cord-191574-1g38scnj 166 20 Method Method NNP cord-191574-1g38scnj 166 21 is be VBZ cord-191574-1g38scnj 166 22 given give VBN cord-191574-1g38scnj 166 23 by by IN cord-191574-1g38scnj 166 24 a a DT cord-191574-1g38scnj 166 25 sum sum NN cord-191574-1g38scnj 166 26 containing contain VBG cord-191574-1g38scnj 166 27 exponential exponential JJ cord-191574-1g38scnj 166 28 terms term NNS cord-191574-1g38scnj 166 29 . . . cord-191574-1g38scnj 167 1 Such such PDT cord-191574-1g38scnj 167 2 a a DT cord-191574-1g38scnj 167 3 representation representation NN cord-191574-1g38scnj 167 4 may may MD cord-191574-1g38scnj 167 5 simplify simplify VB cord-191574-1g38scnj 167 6 the the DT cord-191574-1g38scnj 167 7 fitting fitting NN cord-191574-1g38scnj 167 8 with with IN cord-191574-1g38scnj 167 9 the the DT cord-191574-1g38scnj 167 10 epidemiological epidemiological JJ cord-191574-1g38scnj 167 11 results result NNS cord-191574-1g38scnj 167 12 . . . cord-191574-1g38scnj 168 1 The the DT cord-191574-1g38scnj 168 2 series series NN cord-191574-1g38scnj 168 3 , , , cord-191574-1g38scnj 168 4 truncated truncate VBN cord-191574-1g38scnj 168 5 to to IN cord-191574-1g38scnj 168 6 a a DT cord-191574-1g38scnj 168 7 small small JJ cord-191574-1g38scnj 168 8 number number NN cord-191574-1g38scnj 168 9 of of IN cord-191574-1g38scnj 168 10 terms term NNS cord-191574-1g38scnj 168 11 , , , cord-191574-1g38scnj 168 12 give give VB cord-191574-1g38scnj 168 13 a a DT cord-191574-1g38scnj 168 14 very very RB cord-191574-1g38scnj 168 15 good good JJ cord-191574-1g38scnj 168 16 description description NN cord-191574-1g38scnj 168 17 of of IN cord-191574-1g38scnj 168 18 the the DT cord-191574-1g38scnj 168 19 numerical numerical JJ cord-191574-1g38scnj 168 20 results result NNS cord-191574-1g38scnj 168 21 for for IN cord-191574-1g38scnj 168 22 a a DT cord-191574-1g38scnj 168 23 large large JJ cord-191574-1g38scnj 168 24 number number NN cord-191574-1g38scnj 168 25 of of IN cord-191574-1g38scnj 168 26 values value NNS cord-191574-1g38scnj 168 27 of of IN cord-191574-1g38scnj 168 28 the the DT cord-191574-1g38scnj 168 29 model model NN cord-191574-1g38scnj 168 30 parameters parameter NNS cord-191574-1g38scnj 168 31 , , , cord-191574-1g38scnj 168 32 and and CC cord-191574-1g38scnj 168 33 of of IN cord-191574-1g38scnj 168 34 the the DT cord-191574-1g38scnj 168 35 initial initial JJ cord-191574-1g38scnj 168 36 conditions condition NNS cord-191574-1g38scnj 168 37 . . . cord-191574-1g38scnj 169 1 In in IN cord-191574-1g38scnj 169 2 fact fact NN cord-191574-1g38scnj 169 3 , , , cord-191574-1g38scnj 169 4 the the DT cord-191574-1g38scnj 169 5 two two CD cord-191574-1g38scnj 169 6 terms term NNS cord-191574-1g38scnj 169 7 approximation approximation NN cord-191574-1g38scnj 169 8 obtained obtain VBN cord-191574-1g38scnj 169 9 with with IN cord-191574-1g38scnj 169 10 the the DT cord-191574-1g38scnj 169 11 use use NN cord-191574-1g38scnj 169 12 of of IN cord-191574-1g38scnj 169 13 the the DT cord-191574-1g38scnj 169 14 Adomian Adomian NNP cord-191574-1g38scnj 169 15 Decomposition Decomposition NNP cord-191574-1g38scnj 169 16 Method Method NNP cord-191574-1g38scnj 169 17 also also RB cord-191574-1g38scnj 169 18 gives give VBZ cord-191574-1g38scnj 169 19 a a DT cord-191574-1g38scnj 169 20 good good JJ cord-191574-1g38scnj 169 21 approximation approximation NN cord-191574-1g38scnj 169 22 of of IN cord-191574-1g38scnj 169 23 the the DT cord-191574-1g38scnj 169 24 results result NNS cord-191574-1g38scnj 169 25 of of IN cord-191574-1g38scnj 169 26 the the DT cord-191574-1g38scnj 169 27 numerical numerical JJ cord-191574-1g38scnj 169 28 integration integration NN cord-191574-1g38scnj 169 29 of of IN cord-191574-1g38scnj 169 30 the the DT cord-191574-1g38scnj 169 31 SIR SIR NNP cord-191574-1g38scnj 169 32 model model NN cord-191574-1g38scnj 169 33 with with IN cord-191574-1g38scnj 169 34 vital vital JJ cord-191574-1g38scnj 169 35 dynamics dynamic NNS cord-191574-1g38scnj 169 36 for for IN cord-191574-1g38scnj 169 37 a a DT cord-191574-1g38scnj 169 38 large large JJ cord-191574-1g38scnj 169 39 range range NN cord-191574-1g38scnj 169 40 of of IN cord-191574-1g38scnj 169 41 parameter parameter NN cord-191574-1g38scnj 169 42 values value NNS cord-191574-1g38scnj 169 43 . . . cord-191574-1g38scnj 170 1 Exact exact JJ cord-191574-1g38scnj 170 2 solutions solution NNS cord-191574-1g38scnj 170 3 of of IN cord-191574-1g38scnj 170 4 the the DT cord-191574-1g38scnj 170 5 epidemiological epidemiological JJ cord-191574-1g38scnj 170 6 models model NNS cord-191574-1g38scnj 170 7 are be VBP cord-191574-1g38scnj 170 8 important important JJ cord-191574-1g38scnj 170 9 for for IN cord-191574-1g38scnj 170 10 epidemiologists epidemiologist NNS cord-191574-1g38scnj 170 11 because because IN cord-191574-1g38scnj 170 12 they -PRON- PRP cord-191574-1g38scnj 170 13 allow allow VBP cord-191574-1g38scnj 170 14 the the DT cord-191574-1g38scnj 170 15 study study NN cord-191574-1g38scnj 170 16 of of IN cord-191574-1g38scnj 170 17 the the DT cord-191574-1g38scnj 170 18 spreading spreading NN cord-191574-1g38scnj 170 19 of of IN cord-191574-1g38scnj 170 20 infectious infectious JJ cord-191574-1g38scnj 170 21 diseases disease NNS cord-191574-1g38scnj 170 22 in in IN cord-191574-1g38scnj 170 23 different different JJ cord-191574-1g38scnj 170 24 situations situation NNS cord-191574-1g38scnj 170 25 . . . cord-191574-1g38scnj 171 1 They -PRON- PRP cord-191574-1g38scnj 171 2 are be VBP cord-191574-1g38scnj 171 3 also also RB cord-191574-1g38scnj 171 4 helpful helpful JJ cord-191574-1g38scnj 171 5 in in IN cord-191574-1g38scnj 171 6 the the DT cord-191574-1g38scnj 171 7 design design NN cord-191574-1g38scnj 171 8 of of IN cord-191574-1g38scnj 171 9 the the DT cord-191574-1g38scnj 171 10 best good JJS cord-191574-1g38scnj 171 11 social social JJ cord-191574-1g38scnj 171 12 strategies strategy NNS cord-191574-1g38scnj 171 13 for for IN cord-191574-1g38scnj 171 14 their -PRON- PRP$ cord-191574-1g38scnj 171 15 control control NN cord-191574-1g38scnj 171 16 . . . cord-191574-1g38scnj 172 1 Hopefully hopefully RB cord-191574-1g38scnj 172 2 the the DT cord-191574-1g38scnj 172 3 results result NNS cord-191574-1g38scnj 172 4 obtained obtain VBN cord-191574-1g38scnj 172 5 in in IN cord-191574-1g38scnj 172 6 the the DT cord-191574-1g38scnj 172 7 present present JJ cord-191574-1g38scnj 172 8 paper paper NN cord-191574-1g38scnj 172 9 may may MD cord-191574-1g38scnj 172 10 also also RB cord-191574-1g38scnj 172 11 contribute contribute VB cord-191574-1g38scnj 172 12 to to IN cord-191574-1g38scnj 172 13 the the DT cord-191574-1g38scnj 172 14 investigations investigation NNS cord-191574-1g38scnj 172 15 of of IN cord-191574-1g38scnj 172 16 the the DT cord-191574-1g38scnj 172 17 dynamics dynamic NNS cord-191574-1g38scnj 172 18 , , , cord-191574-1g38scnj 172 19 evolution evolution NN cord-191574-1g38scnj 172 20 and and CC cord-191574-1g38scnj 172 21 long long JJ cord-191574-1g38scnj 172 22 term term NN cord-191574-1g38scnj 172 23 impact impact NN cord-191574-1g38scnj 172 24 of of IN cord-191574-1g38scnj 172 25 the the DT cord-191574-1g38scnj 172 26 present present JJ cord-191574-1g38scnj 172 27 and and CC cord-191574-1g38scnj 172 28 of of IN cord-191574-1g38scnj 172 29 the the DT cord-191574-1g38scnj 172 30 future future JJ cord-191574-1g38scnj 172 31 epidemics epidemic NNS cord-191574-1g38scnj 172 32 . . . cord-191574-1g38scnj 173 1 Mathematical mathematical JJ cord-191574-1g38scnj 173 2 Biology biology NN cord-191574-1g38scnj 173 3 : : : cord-191574-1g38scnj 173 4 I. I. NNP cord-191574-1g38scnj 173 5 An an DT cord-191574-1g38scnj 173 6 Introduction introduction NN cord-191574-1g38scnj 173 7 Epidemic epidemic NN cord-191574-1g38scnj 173 8 Modeling modeling NN cord-191574-1g38scnj 173 9 : : : cord-191574-1g38scnj 174 1 An an DT cord-191574-1g38scnj 174 2 Introduction introduction NN cord-191574-1g38scnj 174 3 Modeling Modeling NNP cord-191574-1g38scnj 174 4 Infectious Infectious NNP cord-191574-1g38scnj 174 5 Diseases Diseases NNPS cord-191574-1g38scnj 174 6 Contribution Contribution NNP cord-191574-1g38scnj 174 7 to to IN cord-191574-1g38scnj 174 8 the the DT cord-191574-1g38scnj 174 9 mathematical mathematical JJ cord-191574-1g38scnj 174 10 theory theory NN cord-191574-1g38scnj 174 11 of of IN cord-191574-1g38scnj 174 12 epidemics epidemic NNS cord-191574-1g38scnj 175 1 Clinical clinical JJ cord-191574-1g38scnj 175 2 features feature NNS cord-191574-1g38scnj 175 3 of of IN cord-191574-1g38scnj 175 4 patients patient NNS cord-191574-1g38scnj 175 5 infected infect VBN cord-191574-1g38scnj 175 6 with with IN cord-191574-1g38scnj 175 7 2019 2019 CD cord-191574-1g38scnj 175 8 novel novel JJ cord-191574-1g38scnj 175 9 coronavirus coronavirus NN cord-191574-1g38scnj 175 10 in in IN cord-191574-1g38scnj 175 11 Effective effective JJ cord-191574-1g38scnj 175 12 containment containment NN cord-191574-1g38scnj 175 13 explains explain VBZ cord-191574-1g38scnj 175 14 subexponential subexponential JJ cord-191574-1g38scnj 175 15 growth growth NN cord-191574-1g38scnj 175 16 in in IN cord-191574-1g38scnj 175 17 recent recent JJ cord-191574-1g38scnj 175 18 confirmed confirm VBD cord-191574-1g38scnj 175 19 COVID-19 covid-19 CD cord-191574-1g38scnj 175 20 cases case NNS cord-191574-1g38scnj 175 21 in in IN cord-191574-1g38scnj 175 22 China China NNP cord-191574-1g38scnj 175 23 Simulating simulate VBG cord-191574-1g38scnj 175 24 the the DT cord-191574-1g38scnj 175 25 spread spread NN cord-191574-1g38scnj 175 26 of of IN cord-191574-1g38scnj 175 27 COVID-19 covid-19 NN cord-191574-1g38scnj 175 28 via via IN cord-191574-1g38scnj 175 29 spatially spatially RB cord-191574-1g38scnj 175 30 - - HYPH cord-191574-1g38scnj 175 31 resolved resolve VBN cord-191574-1g38scnj 175 32 susceptible susceptible JJ cord-191574-1g38scnj 175 33 - - HYPH cord-191574-1g38scnj 175 34 exposed expose VBN cord-191574-1g38scnj 175 35 - - HYPH cord-191574-1g38scnj 175 36 infected infect VBN cord-191574-1g38scnj 175 37 - - HYPH cord-191574-1g38scnj 175 38 recovered recover VBN cord-191574-1g38scnj 175 39 deceased deceased JJ cord-191574-1g38scnj 175 40 ( ( -LRB- cord-191574-1g38scnj 175 41 SEIRD SEIRD NNP cord-191574-1g38scnj 175 42 ) ) -RRB- cord-191574-1g38scnj 175 43 model model NN cord-191574-1g38scnj 175 44 with with IN cord-191574-1g38scnj 175 45 heterogeneous heterogeneous JJ cord-191574-1g38scnj 175 46 diffusion diffusion NN cord-191574-1g38scnj 175 47 Size size NN cord-191574-1g38scnj 175 48 and and CC cord-191574-1g38scnj 175 49 timescale timescale NN cord-191574-1g38scnj 175 50 of of IN cord-191574-1g38scnj 175 51 epidemics epidemic NNS cord-191574-1g38scnj 175 52 in in IN cord-191574-1g38scnj 175 53 the the DT cord-191574-1g38scnj 175 54 SIR SIR NNP cord-191574-1g38scnj 175 55 framework framework NN cord-191574-1g38scnj 175 56 , , , cord-191574-1g38scnj 175 57 Phys Phys NNP cord-191574-1g38scnj 175 58 . . . cord-191574-1g38scnj 176 1 D D NNP cord-191574-1g38scnj 176 2 Nonlinear Nonlinear NNP cord-191574-1g38scnj 176 3 Phenom Phenom NNP cord-191574-1g38scnj 176 4 Computing compute VBG cord-191574-1g38scnj 176 5 the the DT cord-191574-1g38scnj 176 6 density density NN cord-191574-1g38scnj 176 7 function function NN cord-191574-1g38scnj 176 8 of of IN cord-191574-1g38scnj 176 9 complex complex JJ cord-191574-1g38scnj 176 10 models model NNS cord-191574-1g38scnj 176 11 with with IN cord-191574-1g38scnj 176 12 randomness randomness NN cord-191574-1g38scnj 176 13 by by IN cord-191574-1g38scnj 176 14 using use VBG cord-191574-1g38scnj 176 15 polynomial polynomial JJ cord-191574-1g38scnj 176 16 expansions expansion NNS cord-191574-1g38scnj 176 17 and and CC cord-191574-1g38scnj 176 18 the the DT cord-191574-1g38scnj 176 19 RVT RVT NNP cord-191574-1g38scnj 176 20 technique technique NN cord-191574-1g38scnj 176 21 . . . cord-191574-1g38scnj 177 1 Application application NN cord-191574-1g38scnj 177 2 to to IN cord-191574-1g38scnj 177 3 the the DT cord-191574-1g38scnj 177 4 SIR SIR NNP cord-191574-1g38scnj 177 5 epidemic epidemic NN cord-191574-1g38scnj 177 6 model model NN cord-191574-1g38scnj 178 1 Susceptible susceptible JJ cord-191574-1g38scnj 178 2 - - HYPH cord-191574-1g38scnj 178 3 Infected Infected NNP cord-191574-1g38scnj 178 4 - - HYPH cord-191574-1g38scnj 178 5 Recovered recovered JJ cord-191574-1g38scnj 178 6 ( ( -LRB- cord-191574-1g38scnj 178 7 SIR SIR NNP cord-191574-1g38scnj 178 8 ) ) -RRB- cord-191574-1g38scnj 178 9 Dynamics Dynamics NNPS cord-191574-1g38scnj 178 10 of of IN cord-191574-1g38scnj 178 11 COVID-19 COVID-19 NNP cord-191574-1g38scnj 178 12 and and CC cord-191574-1g38scnj 178 13 Economic Economic NNP cord-191574-1g38scnj 178 14 Impact Impact NNP cord-191574-1g38scnj 179 1 Inferring infer VBG cord-191574-1g38scnj 179 2 change change NN cord-191574-1g38scnj 179 3 points point NNS cord-191574-1g38scnj 179 4 in in IN cord-191574-1g38scnj 179 5 the the DT cord-191574-1g38scnj 179 6 COVID-19 covid-19 JJ cord-191574-1g38scnj 179 7 spreading spreading NN cord-191574-1g38scnj 179 8 reveals reveal VBZ cord-191574-1g38scnj 179 9 the the DT cord-191574-1g38scnj 179 10 effectiveness effectiveness NN cord-191574-1g38scnj 179 11 of of IN cord-191574-1g38scnj 179 12 interventions intervention NNS cord-191574-1g38scnj 179 13 How how WRB cord-191574-1g38scnj 179 14 to to TO cord-191574-1g38scnj 179 15 reduce reduce VB cord-191574-1g38scnj 179 16 epidemic epidemic NN cord-191574-1g38scnj 179 17 peaks peak NNS cord-191574-1g38scnj 179 18 keeping keep VBG cord-191574-1g38scnj 179 19 under under IN cord-191574-1g38scnj 179 20 control control NN cord-191574-1g38scnj 179 21 the the DT cord-191574-1g38scnj 179 22 time time NN cord-191574-1g38scnj 179 23 - - HYPH cord-191574-1g38scnj 179 24 span span NN cord-191574-1g38scnj 179 25 of of IN cord-191574-1g38scnj 179 26 the the DT cord-191574-1g38scnj 179 27 epidemic epidemic NN cord-191574-1g38scnj 180 1 Forecasting forecasting NN cord-191574-1g38scnj 180 2 COVID COVID NNP cord-191574-1g38scnj 180 3 19 19 CD cord-191574-1g38scnj 180 4 growth growth NN cord-191574-1g38scnj 180 5 in in IN cord-191574-1g38scnj 180 6 India India NNP cord-191574-1g38scnj 180 7 using use VBG cord-191574-1g38scnj 180 8 Susceptible susceptible JJ cord-191574-1g38scnj 180 9 - - HYPH cord-191574-1g38scnj 180 10 Infected Infected NNP cord-191574-1g38scnj 180 11 - - HYPH cord-191574-1g38scnj 180 12 Recovered recovered JJ cord-191574-1g38scnj 180 13 ( ( -LRB- cord-191574-1g38scnj 180 14 SIR SIR NNP cord-191574-1g38scnj 180 15 ) ) -RRB- cord-191574-1g38scnj 180 16 model model NN cord-191574-1g38scnj 181 1 The the DT cord-191574-1g38scnj 181 2 challenges challenge NNS cord-191574-1g38scnj 181 3 of of IN cord-191574-1g38scnj 181 4 modeling model VBG cord-191574-1g38scnj 181 5 and and CC cord-191574-1g38scnj 181 6 forecasting forecast VBG cord-191574-1g38scnj 181 7 the the DT cord-191574-1g38scnj 181 8 spread spread NN cord-191574-1g38scnj 181 9 of of IN cord-191574-1g38scnj 181 10 COVID-19 COVID-19 NNP cord-191574-1g38scnj 181 11 A a DT cord-191574-1g38scnj 181 12 feedback feedback NN cord-191574-1g38scnj 181 13 SIR SIR NNP cord-191574-1g38scnj 181 14 ( ( -LRB- cord-191574-1g38scnj 181 15 fSIR fsir JJ cord-191574-1g38scnj 181 16 ) ) -RRB- cord-191574-1g38scnj 181 17 model model NN cord-191574-1g38scnj 181 18 highlights highlight VBZ cord-191574-1g38scnj 181 19 advantages advantage NNS cord-191574-1g38scnj 181 20 and and CC cord-191574-1g38scnj 181 21 limitations limitation NNS cord-191574-1g38scnj 181 22 of of IN cord-191574-1g38scnj 181 23 infection infection NN cord-191574-1g38scnj 181 24 - - HYPH cord-191574-1g38scnj 181 25 based base VBN cord-191574-1g38scnj 181 26 social social JJ cord-191574-1g38scnj 181 27 distancing distance VBG cord-191574-1g38scnj 181 28 Estimation Estimation NNP cord-191574-1g38scnj 181 29 of of IN cord-191574-1g38scnj 181 30 COVID-19 COVID-19 NNP cord-191574-1g38scnj 181 31 spread spread NN cord-191574-1g38scnj 181 32 curves curve NNS cord-191574-1g38scnj 181 33 integrating integrate VBG cord-191574-1g38scnj 181 34 global global JJ cord-191574-1g38scnj 181 35 data datum NNS cord-191574-1g38scnj 181 36 and and CC cord-191574-1g38scnj 181 37 borrowing borrow VBG cord-191574-1g38scnj 181 38 information information NN cord-191574-1g38scnj 181 39 Phenomenological phenomenological JJ cord-191574-1g38scnj 181 40 dynamics dynamic NNS cord-191574-1g38scnj 181 41 of of IN cord-191574-1g38scnj 181 42 COVID-19 COVID-19 NNP cord-191574-1g38scnj 181 43 pandemic pandemic NN cord-191574-1g38scnj 181 44 : : : cord-191574-1g38scnj 181 45 meta meta NN cord-191574-1g38scnj 181 46 - - HYPH cord-191574-1g38scnj 181 47 analysis analysis NN cord-191574-1g38scnj 181 48 for for IN cord-191574-1g38scnj 181 49 adjustment adjustment NN cord-191574-1g38scnj 181 50 parameters parameter NNS cord-191574-1g38scnj 181 51 On on IN cord-191574-1g38scnj 181 52 the the DT cord-191574-1g38scnj 181 53 Emergence emergence NN cord-191574-1g38scnj 181 54 of of IN cord-191574-1g38scnj 181 55 a a DT cord-191574-1g38scnj 181 56 Power Power NNP cord-191574-1g38scnj 181 57 Law Law NNP cord-191574-1g38scnj 181 58 in in IN cord-191574-1g38scnj 181 59 the the DT cord-191574-1g38scnj 181 60 Distribution Distribution NNP cord-191574-1g38scnj 181 61 of of IN cord-191574-1g38scnj 181 62 COVID-19 COVID-19 NNP cord-191574-1g38scnj 181 63 Cases Cases NNPS cord-191574-1g38scnj 181 64 Optimal Optimal NNP cord-191574-1g38scnj 181 65 control control NN cord-191574-1g38scnj 181 66 of of IN cord-191574-1g38scnj 181 67 an an DT cord-191574-1g38scnj 181 68 SIR SIR NNP cord-191574-1g38scnj 181 69 epidemic epidemic NN cord-191574-1g38scnj 181 70 through through IN cord-191574-1g38scnj 181 71 finite finite JJ cord-191574-1g38scnj 181 72 - - HYPH cord-191574-1g38scnj 181 73 time time NN cord-191574-1g38scnj 181 74 non non JJ cord-191574-1g38scnj 181 75 - - JJ cord-191574-1g38scnj 181 76 pharmaceutical pharmaceutical JJ cord-191574-1g38scnj 181 77 intervention intervention NN cord-191574-1g38scnj 181 78 Understanding understand VBG cord-191574-1g38scnj 181 79 the the DT cord-191574-1g38scnj 181 80 COVID19 COVID19 NNP cord-191574-1g38scnj 181 81 infection infection NN cord-191574-1g38scnj 182 1 curves curve NNS cord-191574-1g38scnj 183 1 -finding -finde VBG cord-191574-1g38scnj 184 1 the the DT cord-191574-1g38scnj 184 2 right right JJ cord-191574-1g38scnj 184 3 numbers number NNS cord-191574-1g38scnj 184 4 Exact exact JJ cord-191574-1g38scnj 184 5 analytical analytical JJ cord-191574-1g38scnj 184 6 solutions solution NNS cord-191574-1g38scnj 184 7 of of IN cord-191574-1g38scnj 184 8 the the DT cord-191574-1g38scnj 184 9 Susceptible susceptible JJ cord-191574-1g38scnj 184 10 - - HYPH cord-191574-1g38scnj 184 11 Infected Infected NNP cord-191574-1g38scnj 184 12 - - HYPH cord-191574-1g38scnj 184 13 Recovered recovered JJ cord-191574-1g38scnj 184 14 ( ( -LRB- cord-191574-1g38scnj 184 15 SIR SIR NNP cord-191574-1g38scnj 184 16 ) ) -RRB- cord-191574-1g38scnj 184 17 epidemic epidemic NN cord-191574-1g38scnj 184 18 model model NN cord-191574-1g38scnj 184 19 and and CC cord-191574-1g38scnj 184 20 of of IN cord-191574-1g38scnj 184 21 the the DT cord-191574-1g38scnj 184 22 SIR SIR NNP cord-191574-1g38scnj 184 23 model model NN cord-191574-1g38scnj 184 24 with with IN cord-191574-1g38scnj 184 25 equal equal JJ cord-191574-1g38scnj 184 26 death death NN cord-191574-1g38scnj 184 27 and and CC cord-191574-1g38scnj 184 28 birth birth NN cord-191574-1g38scnj 184 29 rates rate NNS cord-191574-1g38scnj 184 30 A a DT cord-191574-1g38scnj 184 31 Mathematical Mathematical NNP cord-191574-1g38scnj 184 32 Model Model NNP cord-191574-1g38scnj 184 33 of of IN cord-191574-1g38scnj 184 34 Epidemics- Epidemics- NNP cord-191574-1g38scnj 185 1 A a DT cord-191574-1g38scnj 185 2 Tutorial Tutorial NNP cord-191574-1g38scnj 185 3 for for IN cord-191574-1g38scnj 185 4 Students student NNS cord-191574-1g38scnj 185 5 , , , cord-191574-1g38scnj 185 6 Mathematics mathematic NNS cord-191574-1g38scnj 185 7 2020 2020 CD cord-191574-1g38scnj 185 8 Variational Variational NNP cord-191574-1g38scnj 185 9 iteration iteration NN cord-191574-1g38scnj 185 10 method method NN cord-191574-1g38scnj 185 11 for for IN cord-191574-1g38scnj 185 12 solving solve VBG cord-191574-1g38scnj 185 13 the the DT cord-191574-1g38scnj 185 14 epidemic epidemic NN cord-191574-1g38scnj 185 15 model model NN cord-191574-1g38scnj 185 16 and and CC cord-191574-1g38scnj 185 17 the the DT cord-191574-1g38scnj 185 18 prey prey NN cord-191574-1g38scnj 185 19 and and CC cord-191574-1g38scnj 185 20 predator predator NN cord-191574-1g38scnj 185 21 problem problem NN cord-191574-1g38scnj 185 22 Solution Solution NNP cord-191574-1g38scnj 185 23 of of IN cord-191574-1g38scnj 185 24 the the DT cord-191574-1g38scnj 185 25 epidemic epidemic NN cord-191574-1g38scnj 185 26 model model NN cord-191574-1g38scnj 185 27 by by IN cord-191574-1g38scnj 185 28 homotopy homotopy JJ cord-191574-1g38scnj 185 29 perturbation perturbation NN cord-191574-1g38scnj 185 30 method method NN cord-191574-1g38scnj 185 31 A a DT cord-191574-1g38scnj 185 32 new new JJ cord-191574-1g38scnj 185 33 method method NN cord-191574-1g38scnj 185 34 for for IN cord-191574-1g38scnj 185 35 solving solve VBG cord-191574-1g38scnj 185 36 epidemic epidemic NN cord-191574-1g38scnj 185 37 model model NN cord-191574-1g38scnj 186 1 A a DT cord-191574-1g38scnj 186 2 review review NN cord-191574-1g38scnj 186 3 of of IN cord-191574-1g38scnj 186 4 the the DT cord-191574-1g38scnj 186 5 decomposition decomposition NN cord-191574-1g38scnj 186 6 method method NN cord-191574-1g38scnj 186 7 in in IN cord-191574-1g38scnj 186 8 applied apply VBN cord-191574-1g38scnj 186 9 mathematics mathematic NNS cord-191574-1g38scnj 186 10 Solving Solving NNP cord-191574-1g38scnj 186 11 Frontier Frontier NNP cord-191574-1g38scnj 186 12 Problems Problems NNPS cord-191574-1g38scnj 186 13 of of IN cord-191574-1g38scnj 186 14 Physics Physics NNP cord-191574-1g38scnj 186 15 : : : cord-191574-1g38scnj 186 16 the the DT cord-191574-1g38scnj 186 17 Decomposition Decomposition NNP cord-191574-1g38scnj 186 18 Method Method NNP cord-191574-1g38scnj 186 19 A a DT cord-191574-1g38scnj 186 20 comparison comparison NN cord-191574-1g38scnj 186 21 between between IN cord-191574-1g38scnj 186 22 the the DT cord-191574-1g38scnj 186 23 variational variational JJ cord-191574-1g38scnj 186 24 iteration iteration NN cord-191574-1g38scnj 186 25 method method NN cord-191574-1g38scnj 186 26 and and CC cord-191574-1g38scnj 186 27 Adomian adomian JJ cord-191574-1g38scnj 186 28 decomposition decomposition NN cord-191574-1g38scnj 186 29 method method NN cord-191574-1g38scnj 186 30 Solving solve VBG cord-191574-1g38scnj 186 31 New New NNP cord-191574-1g38scnj 186 32 Fourth fourth JJ cord-191574-1g38scnj 186 33 - - HYPH cord-191574-1g38scnj 186 34 Order Order NNP cord-191574-1g38scnj 186 35 Emden Emden NNP cord-191574-1g38scnj 186 36 - - HYPH cord-191574-1g38scnj 186 37 Fowler Fowler NNP cord-191574-1g38scnj 186 38 - - HYPH cord-191574-1g38scnj 186 39 Type Type NNP cord-191574-1g38scnj 186 40 Equations Equations NNPS cord-191574-1g38scnj 186 41 by by IN cord-191574-1g38scnj 187 1 the the DT cord-191574-1g38scnj 187 2 Adomian Adomian NNP cord-191574-1g38scnj 187 3 Decomposition Decomposition NNP cord-191574-1g38scnj 187 4 Method Method NNP cord-191574-1g38scnj 187 5 A a DT cord-191574-1g38scnj 187 6 reliable reliable JJ cord-191574-1g38scnj 187 7 algorithm algorithm NN cord-191574-1g38scnj 187 8 for for IN cord-191574-1g38scnj 187 9 positive positive JJ cord-191574-1g38scnj 187 10 solutions solution NNS cord-191574-1g38scnj 187 11 of of IN cord-191574-1g38scnj 187 12 nonlinear nonlinear JJ cord-191574-1g38scnj 187 13 boundary boundary JJ cord-191574-1g38scnj 187 14 value value NN cord-191574-1g38scnj 187 15 problems problem NNS cord-191574-1g38scnj 187 16 by by IN cord-191574-1g38scnj 187 17 the the DT cord-191574-1g38scnj 187 18 multistage multistage JJ cord-191574-1g38scnj 187 19 Adomian adomian JJ cord-191574-1g38scnj 187 20 decomposition decomposition NN cord-191574-1g38scnj 187 21 method method NN cord-191574-1g38scnj 187 22 Computation computation NN cord-191574-1g38scnj 187 23 of of IN cord-191574-1g38scnj 187 24 the the DT cord-191574-1g38scnj 187 25 general general JJ cord-191574-1g38scnj 187 26 relativistic relativistic JJ cord-191574-1g38scnj 187 27 perihelion perihelion NN cord-191574-1g38scnj 187 28 precession precession NN cord-191574-1g38scnj 187 29 and and CC cord-191574-1g38scnj 187 30 of of IN cord-191574-1g38scnj 187 31 light light JJ cord-191574-1g38scnj 187 32 deflection deflection NN cord-191574-1g38scnj 187 33 via via IN cord-191574-1g38scnj 187 34 the the DT cord-191574-1g38scnj 187 35 Laplace Laplace NNP cord-191574-1g38scnj 187 36 - - HYPH cord-191574-1g38scnj 187 37 Adomian Adomian NNP cord-191574-1g38scnj 187 38 Decomposition decomposition NN cord-191574-1g38scnj 187 39 Method method NN cord-191574-1g38scnj 187 40 Analytical analytical JJ cord-191574-1g38scnj 187 41 and and CC cord-191574-1g38scnj 187 42 numerical numerical JJ cord-191574-1g38scnj 187 43 treatment treatment NN cord-191574-1g38scnj 187 44 of of IN cord-191574-1g38scnj 187 45 Falkner Falkner NNP cord-191574-1g38scnj 187 46 - - HYPH cord-191574-1g38scnj 187 47 Skan Skan NNP cord-191574-1g38scnj 187 48 equation equation NN cord-191574-1g38scnj 187 49 via via IN cord-191574-1g38scnj 187 50 a a DT cord-191574-1g38scnj 187 51 transformation transformation NN cord-191574-1g38scnj 187 52 and and CC cord-191574-1g38scnj 187 53 Adomian Adomian NNP cord-191574-1g38scnj 187 54 's 's POS cord-191574-1g38scnj 187 55 method method NN cord-191574-1g38scnj 187 56 Solving solve VBG cord-191574-1g38scnj 187 57 the the DT cord-191574-1g38scnj 187 58 nonlinear nonlinear JJ cord-191574-1g38scnj 187 59 biharmonic biharmonic JJ cord-191574-1g38scnj 187 60 equation equation NN cord-191574-1g38scnj 187 61 by by IN cord-191574-1g38scnj 187 62 the the DT cord-191574-1g38scnj 187 63 Laplace Laplace NNP cord-191574-1g38scnj 187 64 - - HYPH cord-191574-1g38scnj 187 65 Adomian Adomian NNP cord-191574-1g38scnj 187 66 and and CC cord-191574-1g38scnj 187 67 Adomian adomian JJ cord-191574-1g38scnj 187 68 Decomposition decomposition NN cord-191574-1g38scnj 187 69 Methods Methods NNPS cord-191574-1g38scnj 187 70 , , , cord-191574-1g38scnj 187 71 Surveys Surveys NNPS cord-191574-1g38scnj 187 72 in in IN cord-191574-1g38scnj 187 73 Mathematics Mathematics NNP cord-191574-1g38scnj 187 74 and and CC cord-191574-1g38scnj 187 75 its -PRON- PRP$ cord-191574-1g38scnj 187 76 Applications application NNS cord-191574-1g38scnj 187 77 Vortex Vortex NNP cord-191574-1g38scnj 187 78 solutions solution NNS cord-191574-1g38scnj 187 79 in in IN cord-191574-1g38scnj 187 80 atomic atomic JJ cord-191574-1g38scnj 187 81 Bose Bose NNP cord-191574-1g38scnj 187 82 - - HYPH cord-191574-1g38scnj 187 83 Einstein Einstein NNP cord-191574-1g38scnj 187 84 condensates condensate NNS cord-191574-1g38scnj 187 85 via via IN cord-191574-1g38scnj 187 86 the the DT cord-191574-1g38scnj 187 87 Adomian adomian JJ cord-191574-1g38scnj 187 88 Decomposition Decomposition NNP cord-191574-1g38scnj 187 89 Method Method NNP cord-191574-1g38scnj 187 90 Solution Solution NNP cord-191574-1g38scnj 187 91 of of IN cord-191574-1g38scnj 187 92 the the DT cord-191574-1g38scnj 187 93 epidemic epidemic NN cord-191574-1g38scnj 187 94 model model NN cord-191574-1g38scnj 187 95 by by IN cord-191574-1g38scnj 187 96 Adomian adomian JJ cord-191574-1g38scnj 187 97 decomposition decomposition NN cord-191574-1g38scnj 187 98 method method NN cord-191574-1g38scnj 188 1 A a DT cord-191574-1g38scnj 188 2 simple simple JJ cord-191574-1g38scnj 188 3 computational computational JJ cord-191574-1g38scnj 188 4 approach approach NN cord-191574-1g38scnj 188 5 to to IN cord-191574-1g38scnj 188 6 the the DT cord-191574-1g38scnj 188 7 Susceptible Susceptible NNP cord-191574-1g38scnj 188 8 - - HYPH cord-191574-1g38scnj 188 9 Infected Infected NNP cord-191574-1g38scnj 188 10 - - HYPH cord-191574-1g38scnj 188 11 Recovered recovered JJ cord-191574-1g38scnj 188 12 ( ( -LRB- cord-191574-1g38scnj 188 13 SIR SIR NNP cord-191574-1g38scnj 188 14 ) ) -RRB- cord-191574-1g38scnj 188 15 epidemic epidemic NN cord-191574-1g38scnj 188 16 model model NN cord-191574-1g38scnj 188 17 via via IN cord-191574-1g38scnj 188 18 the the DT cord-191574-1g38scnj 188 19 Laplace Laplace NNP cord-191574-1g38scnj 188 20 - - HYPH cord-191574-1g38scnj 188 21 Adomian Adomian NNP cord-191574-1g38scnj 188 22 Decomposition decomposition NN cord-191574-1g38scnj 188 23 Method Method NNP cord-191574-1g38scnj 188 24 On on IN cord-191574-1g38scnj 188 25 the the DT cord-191574-1g38scnj 188 26 Integrability Integrability NNP cord-191574-1g38scnj 188 27 of of IN cord-191574-1g38scnj 188 28 the the DT cord-191574-1g38scnj 188 29 SIR SIR NNP cord-191574-1g38scnj 188 30 Epidemic Epidemic NNP cord-191574-1g38scnj 188 31 Model Model NNP cord-191574-1g38scnj 188 32 with with IN cord-191574-1g38scnj 188 33 Vital vital JJ cord-191574-1g38scnj 188 34 Dynamics dynamic NNS