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 Cyclic dynamics f(-x) = T (f(x)) tommy1729 Ultimate Fellow Posts: 1,480 Threads: 354 Joined: Feb 2009 08/24/2015, 11:56 PM Let analytic a(z) = a^[r](z) for all z and some real r <> 1. Cyclic dynamics fundamental equation. F( a(z) ) = T ( F(z) ) With T entire. Less general By using g(q x) = a( g(x) ) , q = exp(2 pi i / r). We get W(q x) = T( W(x) ). --- Example F(-x) = F(x) + pi i Solution ln(x). Can you find F(-x) = g * F(x) + h Note 1) we consider only nonconstant solutions Note 2) we prefer a(x) to have exactly one fixpoint , so that its iterations are Unique ! Regards Tommy1729 tommy1729 Ultimate Fellow Posts: 1,480 Threads: 354 Joined: Feb 2009 08/25/2015, 08:13 AM The solution seems to be constructible by using again a superfunction. Example F(-x) = e F(x) Ln(-x) = ln(x) + pi i Exp(x+1) = e exp(x) So F = exp(ln(x)/(pi i)) = x^(- 1/pi i) Regards Tommy1729 tommy1729 Ultimate Fellow Posts: 1,480 Threads: 354 Joined: Feb 2009 08/25/2015, 08:23 AM Assuming the assumption in the previous post was correct , we need to show that the equation keeps on being valid on the other branches too ... Or when that is not the case. Analytic continuation probably is key here. Its easy when the range and domain are on the same branch ( such as the example x^(- 1/pi i). Then we get A --> B --> A I think this is not so hard. Regards Tommy1729 « Next Oldest | Next Newest »

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