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arXiv 1607.00601math.DS
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Cantor极小的自然扩张不增加拓扑秩

Topological rank does not increase by natural extension of Cantor minimals

Takashi Shimomura

摘要:

Downarowicz和Maass(2008)定义了所有Cantor极小同胚的拓扑秩。另一方面,Gambaudo和Martens(2006)将所有的Cantor极小连续满射表示为某些图覆盖的逆极限。利用上述结果,我们将拓扑秩的概念推广到所有的Cantor极小连续满射。本文证明了对Cantor极小连续满射作自然扩张并不增加其拓扑秩。此外,我们将结果应用到最小符号的情况下。

英文摘要:

Downarowicz and Maass (2008) have defined the topological rank for all Cantor minimal homeomorphisms. On the other hand, Gambaudo and Martens (2006) have expressed all Cantor minimal continuous surjections as the inverse limits of certain graph coverings. Using the aforementioned results, we previously extended the notion of topological rank to all Cantor minimal continuous surjections. In this paper, we show that taking natural extensions of Cantor minimal continuous surjections does not increase their topological ranks. Further, we apply the result to the minimal symbolic case.

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