Functional envelope of Cantor spaces
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- 作者：Xing Fu Zhong ; Jie Lü
- 关键词：Mixing ; topological entropy ; Cantor spaces ; functional envelopes
- 刊名：Acta Mathematica Sinica, English Series
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：33
- 期：3
- 页码：327-340
- 全文大小：
- 刊物类别：Mathematics and Statistics
- 刊物主题：Mathematics, general;
- 出版者：Institute of Mathematics, Chinese Academy of Sciences and Chinese Mathematical Society
- ISSN：1439-7617
- 卷排序：33
文摘
Given a topological dynamical system (X, T), where X is a compact metric space and T a continuous selfmap of X. Denote by S(X) the space of all continuous selfmaps of X with the compactopen topology. The functional envelope of (X, T) is the system (S(X), FT ), where FT is defined by FT (φ) = T ◦ φ for any φ ∈ S(X). We show that (1) If (Σ, T) is respectively weakly mixing, strongly mixing, diagonally transitive, then so is its functional envelope, where Σ is any closed subset of a Cantor set and T a selfmap of Σ; (2) If (S(Σ), Fσ) is transitive then it is Devaney chaos, where (Σ, σ) is a subshift of finite type; (3) If (Σ, T) has shadowing property, then (SU(Σ), FT ) has shadowing property, where Σ is any closed subset of a Cantor set and T a selfmap of Σ; (4) If (X, T) is sensitive, where X is an interval or any closed subset of a Cantor set and T: X → X is continuous, then (SU(X), FT) is sensitive; (5) If Σ is a closed subset of a Cantor set with infinite points and T: Σ → Σ is positively expansive then the entropy entU(FT ) of the functional envelope of (Σ, T) is infinity.