Finite order automorphisms and dimension groups of Cantor minimal systems

Finite order automorphisms and dimension groups of Cantor minimal systems
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康托极小系统的有限阶自同构和维数群

DOI:
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发表时间:
2001
期刊:
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影响因子:
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通讯作者:
松井 宏樹
松井 宏樹
中科院分区:
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作者:
松井 宏樹

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本文计算了有限群值上圈所对应的Cantor极小系统的斜积扩张的维数群。利用它,我们研究了Cantor极小系统的交换群中的有限子群,证明了模映射的核的有限子群必是循环的。此外,我们还给出了交换群的有限子群与模映射的核有非零交的一个障碍。我们还给出了维数群使得模映射的核包含有限阶元的一个充要条件。
We compute the dimension group of the skew product extension of a Cantor minimal system associated with a finite group valued cocycle. Using it, we study finite subgroups in the commutant group of a Cantor minimal system and prove that a finite subgroup of the kernel of the mod map must be cyclic. Moreover, we give a certain obstruction for finite subgroups of commutant groups to have nonzero intersection to the kernel of mod maps. We also give a necessary and sufficient condition for dimension groups so that the kernel of the mod map can include a finite order element.
DOI: 10.1017/s0143385700000948
发表时间: 2000-12
影响因子: 0.9
作者:
Richard Gjerde;Ø. Johansen
通讯作者: Richard Gjerde;Ø. Johansen