Partial C*-dynamics and Rokhlin dimension
Partial C*-dynamics and Rokhlin dimension
复制标题
部分 C* 动力学和 Rokhlin 维数
DOI:
10.1017/etds.2021.82
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发表时间:
2021
影响因子:
0.9
通讯作者:
S. Geffen
中科院分区:
文献类型:
--
作者:
F. Abadie;E. Gardella;S. Geffen
We develop the notion of the Rokhlin dimension for partial actions of finite groups, extending the well-established theory for global systems. The partial setting exhibits phenomena that cannot be expected for global actions, usually stemming from the fact that virtually all averaging arguments for finite group actions completely break down for partial systems. For example, fixed point algebras and crossed products are not in general Morita equivalent, and there is in general no local approximation of the crossed product by matrices over A. Using decomposition arguments for partial actions of finite groups, we show that a number of structural properties are preserved by formation of crossed products, including finite stable rank, finite nuclear dimension, and absorption of a strongly self-absorbing -algebra. Some of our results are new even in the global case. We also study the Rokhlin dimension of globalizable actions: while in general it differs from the Rokhlin dimension of its globalization, we show that they agree if the coefficient algebra is unital. For topological partial actions on spaces of finite covering dimension, we show that finiteness of the Rokhlin dimension is equivalent to freeness, thus providing a large class of examples to which our theory applies.
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影响因子:
1.7
作者:
Shirly Geffen
通讯作者:
Shirly Geffen
DOI:
10.1016/j.jfa.2021.109112
发表时间:
2021
期刊:
arXiv: Operator Algebras
影响因子:
--
作者:
F. Abadie;E. Gardella;S. Geffen
通讯作者:
S. Geffen
影响因子:
2.5
作者:
Masaki Izumi
通讯作者:
Masaki Izumi
影响因子:
0.9
作者:
Eusebio Gardella;Ilan Hirshberg;Luis Santiago
通讯作者:
Eusebio Gardella;Ilan Hirshberg;Luis Santiago
影响因子:
0.9
作者:
Ilan Hirshberg;N. Phillips
通讯作者:
N. Phillips