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arXiv 0806.1974math.DS
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关于圆上极小群作用的遍历性问题

On the question of ergodicity for minimal group actions on the circle

Bertrand Deroin, Victor Kleptsyn, Andrés Navas

摘要:

本文研究了圆上有限生成群的极小光滑作用。我们提供了一个充分条件,这样的行动是遍历(关于勒贝格测度),我们说明了这个条件,通过研究两个相关的例子。在类似的假设下,我们也讨论了例外极小集的零勒贝格测度问题。这个假设导致了许多其他有趣的结论,主要是关于固定和共形措施。此外,还有几个问题有待解决。这些方法也适用于余维一叶理,尽管这种情况下的结果没有明确说明。

英文摘要:

This work is devoted to the study of minimal, smooth actions of finitely generated groups on the circle. We provide a sufficient condition for such an action to be ergodic (with respect to the Lebesgue measure), and we illustrate this condition by studying two relevant examples. Under an analogous hypothesis, we also deal with the problem of the zero Lebesgue measure for exceptional minimal sets. This hypothesis leads to many other interesting conclusions, mainly concerning the stationary and conformal measures. Moreover, several questions are left open. The methods work as well for codimension-one foliations, though the results for this case are not explicitly stated.

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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