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arXiv 1202.3113math.DS
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单位圆上旋积的常返集和非常返集的新例

Some new examples of recurrence and non-recurrence sets for products of rotations on the unit circle

Sophie Grivaux, Maria Roginskaya

摘要:

本文研究了紧空间上动力系统的常返集和非常返集,特别是单位圆T上的旋转积。一个整数集称为r-Bohr,如果它对T上所有r旋转的乘积都是递归的,而Bohr如果它对T上所有旋转的乘积都是递归的。这是一个结果,由于Katznelson,对于每个r存在的整数集是r-玻尔,但不是(r+1)-玻尔。我们提出了新的例子r-玻尔集,这不是玻尔,由于建设是灵活的,完全明确的。我们的结果涉及到一个老的组合问题的Veech关于syndetic集和玻尔拓扑Z,其reformulation的递归集,这是由于Reynner和Weiss。

英文摘要:

We study recurrence and non-recurrence sets for dynamical systems on compact spaces, in particular for products of rotations on the unit circle T. A set of integers is called r-Bohr if it is recurrent for all products of r rotations on T, and Bohr if it is recurrent for all products of rotations on T. It is a result due to Katznelson that for each r there exist sets of integers which are r-Bohr but not (r+1)-Bohr. We present new examples of r-Bohr sets which are not Bohr, thanks to a construction which is both flexible and completely explicit. Our results are related to an old combinatorial problem of Veech concerning syndetic sets and the Bohr topology on Z, and its reformulation in terms of recurrence sets which is due to Glasner and Weiss.

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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