Constructions in elliptic dynamics

Details Constructions in elliptic dynamics Constructions in elliptic dynamics

2005-01-22

arxiv.org/abs/math/0501362v1

Mathematics

Dynamical Systems

Dedicated to the memory of Michel Herman

Scientific paper

We present an overview and some new applications of the approximation by conjugation method introduced by Anosov and the second author more than thirty years ago \cite{AK}. Michel Herman made important contributions to the development and applications of this method beginning from the construction of minimal and uniquely ergodic diffeomorphisms jointly with Fathi in \cite{FH} and continuing with exotic invariant sets of rational maps of the Riemann sphere \cite{H3}, and the construction of invariant tori with nonstandard and unexpected behavior in the context of KAM theory \cite{H1, H2}. Recently the method has been experiencing a revival. Some of the new results presented in the paper illustrate variety of uses for tools available for a long time, others exploit new methods, in particular possibility of mixing in the context of Liouvillean dynamics discovered by the first author \cite{F1, F2}.

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