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arXiv 1808.05934math.DS
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随机代换子移位中的周期点

Periodic points in random substitution subshifts

Dan Rust

摘要:

我们研究了随机替换子移位的周期点的各个方面。为了做到这一点,我们引入了一个新的属性称为不相交图像条件的随机替换。我们提供了一个程序,用于确定兼容的随机置换随机置换,其中一个定义良好的abelianisation存在的属性。我们找到了一些简单的必要准则,原始的,兼容的随机替换承认周期点在其子移位。在随机替换还具有不相交图像且长度恒定的情况下,我们给出了一个更强的判据。给出了一种在随机置换子移位中枚举任意指定长度的周期点的方法。

英文摘要:

We study various aspects of periodic points for random substitution subshifts. In order to do so, we introduce a new property for random substitutions called the disjoint images condition. We provide a procedure for determining the property for compatible random substitutions-random substitutions for which a well-defined abelianisation exists. We find some simple necessary criteria for primitive, compatible random substitutions to admit periodic points in their subshifts. In the case that the random substitution further has disjoint images and is of constant length, we provide a stronger criterion. A method is outlined for enumerating periodic points of any specified length in a random substitution subshift.

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