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Talk:Evolution operator

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Revision as of 20:22, 16 October 2017 by Boris Tsirelson (talk | contribs) (→‎Parameter space: clarification)
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Parameter space

It seems that the parameters $t,s$ are usually taken to lie in some subset of the reals. The condition "If $t,s$ belong to an infinite-dimensional space" seems incorrect, and I have replaced it with the anodyne "Under some circumstances" which is consistent with the reference [a1]. Richard Pinch (talk) 20:45, 16 October 2017 (CEST)

Yes. Looking at the corresponding article in Russian I do not understand, wherefrom came this strange phrase.
In addition, "linear operator-function of $t$ and $s$" may seem to mean linearity in $(s,t)$ (while the operators need not be linear). But of course, the true meaning is a (nonlinear) map from $(s,t)$ to linear operators. Boris Tsirelson (talk) 22:22, 16 October 2017 (CEST)
How to Cite This Entry:
Evolution operator. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Evolution_operator&oldid=42093