Countably and entropy expansive homeomorphisms with the shadowing property

Artigue, Alfonso; Carvalho, Bernardo; Cordeiro, Welington; Vieitez, José

doi:10.1090/proc/15326

Countably and entropy expansive homeomorphisms with the shadowing property
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by Alfonso Artigue, Bernardo Carvalho, Welington Cordeiro and José Vieitez PDF

Proc. Amer. Math. Soc. 150 (2022), 3369-3378 Request permission

Abstract:

We discuss the dynamics beyond topological hyperbolicity considering homeomorphisms satisfying the shadowing property and generalizations of expansivity. It is proved that transitive countably expansive homeomorphisms satisfying the shadowing property are expansive in the set of transitive points. This is in contrast with pseudo-Anosov diffeomorphisms of the two-dimensional sphere that are transitive, cw-expansive, satisfy the shadowing property but the dynamical ball in each transitive point contains a Cantor subset. We exhibit examples of countably expansive homeomorphisms that are not finite expansive, satisfy the shadowing property and admits an infinite number of chain-recurrent classes. We further explore the relation between countable and entropy expansivity and prove that for surface homeomorphisms $f\colon S\to S$ satisfying the shadowing property and $\Omega (f)=S$, both countably expansive and entropy cw-expansive are equivalent to being topologically conjugate to an Anosov diffeomorphism.

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