Universal minimal flows of extensions of and by compact groups

Universal minimal flows of extensions of and by compact groups
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紧凑群的扩展的通用最小流

DOI:
10.1017/etds.2022.52
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发表时间:
2023
影响因子:
0.9
通讯作者:
BARTOŠOVÁ, DANA
BARTOŠOVÁ, DANA
中科院分区:
数学2区
文献类型:
--
作者:
BARTOŠOVÁ, DANA

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每个拓扑G组,同构,一个唯一的最小G-flow映射到每一个最小G-flow,通用最小流,我们表明,如果G有一个紧凑的正规子群K,行为自由和存在一个均匀连续的横截面上的相空间是同胚的相空间的产品与K .此外,如果G左右千篇一律或G同构半直积相一致,我们也恢复行动,在后一种情况下,扩展了Kechris和sokiki的结果。作为一个应用,我们证明了具有正规开紧子群的任意完全不连通的局部紧波兰群G的相空间同胚于有限集合、Cantor集合、、或
Every topological group G has, up to isomorphism, a unique minimal G-flow that maps onto every minimal G-flow, the universal minimal flow We show that if G has a compact normal subgroup K that acts freely on and there exists a uniformly continuous cross-section from to then the phase space of is homeomorphic to the product of the phase space of with K. Moreover, if either the left and right uniformities on G coincide or G is isomorphic to a semidirect product , we also recover the action, in the latter case extending a result of Kechris and Sokić. As an application, we show that the phase space of for any totally disconnected locally compact Polish group G with a normal open compact subgroup is homeomorphic to a finite set, the Cantor set , , or
DOI: --
发表时间: 1936
期刊:
影响因子: --
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弗斯滕伯格结构定理。
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DOI: 10.1090/s0002-9939-1994-1246512-x
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