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JOURNALS // Trudy Moskovskogo Matematicheskogo Obshchestva // Archive

Tr. Mosk. Mat. Obs., 2021 Volume 82, Issue 1, Pages 3–18 (Mi mmo644)

This article is cited in 1 paper

Positive entropy implies chaos along any infinite sequence

Wen Huanga, Jian Lib, Xiangdong Yea

a School of Mathematical Sciences, University of Science and Technology of China
b Department of Mathematics, Shantou University

Abstract: Let $G$ be an infinite countable discrete amenable group. For any $G$-action on a compact metric space $(X,\rho)$, it turns out that if the action has positive topological entropy, then for any sequence $\{s_i\}_{i=1}^{+\infty}$ with pairwise distinct elements in $G$ there exists a Cantor subset $K$ of $X$ which is Li–Yorke chaotic along this sequence, that is, for any two distinct points $x,y\in K$, one has
$$ \limsup\limits_{i\to+\infty}\rho(s_i x,s_iy)>0,\ \text{and}\ \liminf_{i\to+\infty}\rho(s_ix,s_iy)=0. $$


Key words and phrases: Li–Yorke chaos, topological entropy, measure-theoretic entropy, amenable group action.

UDC: 517.987.5

MSC: 37B05, 37B40, 37A35

Received: 14.06.2020
Revised: 14.12.2020

Language: English


 English version:
Transactions of the Moscow Mathematical Society, 2021, 82, 1–14

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© Steklov Math. Inst. of RAS, 2024