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arXiv 0904.0848math.DSmath.RT
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紧群上遍历${\mathbb Z} ^d$ -作用中遍历自同构的存在性

On the existence of ergodic automorphisms in ergodic ${\mathbb Z} ^d$-actions on compact groups

C. R. E. Raja

摘要:

设$K$是一个紧可度量化群,$\Ga$是$K$的交换自同构的可有限生成群.证明了$\Ga$的遍历性意味着当作用中心$Z(\Ga) = \{\ap \in {\rm Aut}(K) \mid \ap {\rm commutes with elements of \rm} \Ga \}$具有DCC时,$\Ga$包含遍历自同构.为了解释的条件中心的行动是不受限制的,我们讨论了某些阿贝尔群,特别是检索定理Berend \cite{Be}和施密特\cite{Sc1}证明在这方面。

英文摘要:

Let $K$ be a compact metrizable group and $\Ga$ be a finitely generated group of commuting automorphisms of $K$. We show that ergodicity of $\Ga$ implies $\Ga$ contains ergodic automorphisms if center of the action, $Z(\Ga) = \{\ap \in {\rm Aut}(K) \mid \ap {\rm commutes with elements of \rm} \Ga \}$ has DCC. To explain that the condition on the center of the action is not restrictive, we discuss certain abelian groups which in particular, retrieves Theorems of Berend \cite{Be} and Schmidt \cite{Sc1} proved in this context.

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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