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Point transitivity, ${\rm\Delta}$-transitivity and multi-minimality

Published online by Cambridge University Press:  14 March 2014

ZHIJING CHEN
Affiliation:
Department of Mathematics, Sun Yat-Sen University, Guangzhou 510275, PR China email chzhjing@mail2.sysu.edu.cn
JIAN LI
Affiliation:
Department of Mathematics, Shantou University, Shantou, Guangdong 515063, PR China email lijian09@mail.ustc.edu.cn
JIE LÜ
Affiliation:
School of Mathematics, South China Normal University, Guangzhou 510631, PR China email ljie@scnu.edu.cn
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Abstract

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Let $(X,f)$ be a topological dynamical system and ${\mathcal{F}}$ be a Furstenberg family (a collection of subsets of $\mathbb{N}$ with hereditary upward property). A point $x\in X$ is called an ${\mathcal{F}}$-transitive point if for every non-empty open subset $U$ of $X$ the entering time set of $x$ into $U$, $\{n\in \mathbb{N}:f^{n}(x)\in U\}$, is in ${\mathcal{F}}$; the system $(X,f)$ is called ${\mathcal{F}}$-point transitive if there exists some ${\mathcal{F}}$-transitive point. In this paper, we first discuss the connection between ${\mathcal{F}}$-point transitivity and ${\mathcal{F}}$-transitivity, and show that weakly mixing and strongly mixing systems can be characterized by ${\mathcal{F}}$-point transitivity, completing results in [Transitive points via Furstenberg family. Topology Appl. 158 (2011), 2221–2231]. We also show that multi-transitivity, ${\rm\Delta}$-transitivity and multi-minimality can be characterized by ${\mathcal{F}}$-point transitivity, answering two questions proposed by Kwietniak and Oprocha [On weak mixing, minimality and weak disjointness of all iterates. Ergod. Th. & Dynam. Sys. 32 (2012), 1661–1672].

Information

Type
Research Article
Copyright
© Cambridge University Press, 2014