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arXiv 1503.03246math.DS
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具有同胚循环群的极小空间

Minimal spaces with cyclic group of homeomorphisms

Tomasz Downarowicz, L'ubomir Snoha, Dariusz Tywoniuk

摘要:

本文主要研究了两个问题。1)对于一个拓扑动力系统$(X,T)$,我们研究了它的“函数包络”($T$在$X$的所有连续自映射空间或所有自同胚空间上的左复合作用)的拓扑熵.特别是,我们证明了零维空间$X$的熵都是无限的,除了当$T$是等度连续的(然后都等于零)。2)我们称$Slovak$ $space$为同胚群是循环的且由极小同胚生成的紧致度量空间。使用斯洛伐克空间,我们提供的例子(最小)系统$(X,T)$的正熵,但,其功能包络同胚熵为零(回答一个问题所提出的Kolyada和Semikina)。最后,也使用斯洛伐克空间,我们解决了一个长期存在的开放问题,无论是圆是一个唯一的非退化连续承认最小的连续变换,但只有可逆的:不,一些斯洛伐克空间是这样的,以及。

英文摘要:

There are two main subjects in this paper. 1) For a topological dynamical system $(X,T)$ we study the topological entropy of its "functional envelopes" (the action of $T$ by left composition on the space of all continuous self-maps or on the space of all self-homeomorphisms of $X$). In particular we prove that for zero-dimensional spaces $X$ both entropies are infinite except when $T$ is equicontinuous (then both equal zero). 2) We call $Slovak$ $space$ any compact metric space whose homeomorphism group is cyclic and generated by a minimal homeomorphism. Using Slovak spaces we provide examples of (minimal) systems $(X,T)$ with positive entropy, yet, whose functional envelope on homeomorphisms has entropy zero (answering a question posed by Kolyada and Semikina). Finally, also using Slovak spaces, we resolve a long standing open problem whether the circle is a unique non-degenerate continuum admitting minimal continuous transformations but only invertible: No, some Slovak spaces are such, as well.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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