Dynamically ordered energy function for Morse-Smale diffeomorphisms on 3-manifolds

Details Dynamically ordered energy function for Morse-Smale diffeomorphisms on 3-manifolds Dynamically ordered energy function for Morse-Smale diffeomorphisms on 3-manifolds

2011-01-31

arxiv.org/abs/1101.6036v2

Mathematics

Geometric Topology

Scientific paper

This note deals with arbitrary Morse-Smale diffeomorphisms in dimension 3 and extends ideas from \cite{GrLaPo}, \cite{GrLaPo1}, where gradient-like case was considered. We introduce a kind of Morse-Lyapunov function, called dynamically ordered, which fits well dynamics of diffeomorphism. The paper is devoted to finding conditions to the existence of such an energy function, that is, a function whose set of critical points coincides with the non-wandering set of the considered diffeomorphism. We show that the necessary and sufficient conditions to the existence of a dynamically ordered energy function reduces to the type of embedding of one-dimensional attractors and repellers of a given Morse-Smale diffeomorphism on a closed 3-manifold.

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