show that every continuous group law $∗$ on an open interval I has the form $x∗y = f(f^{-1} (x)+f^{ −1} (y))$ for some homeomorphism

Asked Jan 14 '21 at 08:15

Active Jan 14 '21 at 08:15

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I was reading this https://kconrad.math.uconn.edu/blurbs/grouptheory/relativity.pdf PDF on RELATIVISTIC ADDITION AND GROUP THEORY and on remark 2.4 he says :

I'm trying to prove that remark buy I have no idea how to start

asked Jan 14 '21 at 08:15

math_addict

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