id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_eaqzphtbf5hzlicyb2ugrd6ojm	Jill North	Two Views on Time Reversal*	2008	28	.pdf	application/pdf	10939	766	61	In a recent paper, David Malament (2004) employs a time reversal transformation that differs from the standard one. They argue that the proper time reversal transformation should convert a given sequence of states into the temporally point.11 In addition to �ipping particle worldlines, the standard transformation also re�ects their 4-velocities across the time slice mirror. because the time-reversed 4-velocity must still point to the future according to the �xed background temporal orientation. 12Since 4-forces and 4-accelerations are de�ned independently of a temporal orientation, under standard time reversal the temporal components of these objects invert The standard time reversal transformation mirrors the fundamental objects in spacetime across a time, keeping the background temporal orientation (if there is one) �xed. A theory is time reversal invariant if a solution always remains a solution after we invert the temporal Malament's time reversal transformation keeps every fundamental object in spacetime at the same location.	./cache/work_eaqzphtbf5hzlicyb2ugrd6ojm.pdf	./txt/work_eaqzphtbf5hzlicyb2ugrd6ojm.txt