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arXiv 1503.02827math.DS
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amenable group作用的零维扩张

Zero-dimensional extensions of amenable group actions

Dawid Huczek

摘要:

证明了可数顺从群$G$通过同胚自由作用的动力系统$X$都有一个忠实的主零维扩张$Y$,即$X$上的$G$不变测度$μ$在$Y$上恰好有一个原像$ν$,且$ν$关于$X$的条件熵为零.这是T. Downarowicz和D. Huczek,它建立了存在的零维主要和忠实的扩展一般行动的一组整数。

英文摘要:

We prove that every dynamical system $X$ with free action of a countable amenable group $G$ by homeomorphisms has a zero-dimensional extension $Y$ which is faithful and principal, i.e. every $G$-invariant measure $μ$ on $X$ has exactly one preimage $ν$ on $Y$ and the conditional entropy of $ν$ with respect to $X$ is zero. This is a version of an earlier result by T. Downarowicz and D. Huczek, which establishes the existence of zero-dimensional principal and faithful extensions for general actions of the group of integers.

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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