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arXiv 0804.4570math.DS
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关于紧与一般系统上的拓扑本质值域与上圈的正则性

On the topological essential range and regularity of cocycles over compact and generic systems

Vyacheslav Kulagin

摘要:

我们考虑了\cite{GH}中引入的极小$\Z$ -系统上连续上循环的拓扑本质值域和正则性的概念,并讨论了它们与一般对应物的关系.另一种类属定义可以通过使用与上循环相关联的类属Mackey作用的概念来给出。我们进一步提出了一个描述的经常性的上循环的最小旋转值的离散群,并得出几个后果。

英文摘要:

We consider the notions of topological essential range and regularity for continuous cocycles over minimal $\Z$-systems introduced in \cite{GH} and discuss relations with their generic counterparts. The alternative generic definitions can be given by using the notion of generic Mackey action associated with a cocycle. We further present a description of recurrent cocycles over minimal rotations with values in discrete groups and derive several consequences.

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