id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ijassa-270	Vallée, Robert	Internal Time of a Dynamical System	2010	5	.pdf	application/pdf	2534	126	65	We propose to introduce a time s, or internal time, different from time t, or reference time. So if X(t), belonging to a finite dimensional linear space, is the state of the system at reference instant t, any real positive and increasing function, null for argument 0, of a norm of dX(t)/dt, is a measure of the intensity of change of the system at instant t .We make the most simple choice, that of the square of the Euclidian norm (or scalar square) (dX(t)/dt)2 which may be seen as an index of “importance” of instant t.	cache/ijassa-270.pdf	txt/ijassa-270.txt