On the Baum-Connes Conjecture for Groups Acting on CAT(0)-Cubical Spaces

On the Baum-Connes Conjecture for Groups Acting on CAT(0)-Cubical Spaces
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关于作用于 CAT(0)-立方空间的群的 Baum-Connes 猜想

DOI:
10.1093/imrn/rnaa059
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发表时间:
2021
影响因子:
1
通讯作者:
Brodzki J
Brodzki J
中科院分区:
数学1区
文献类型:
--
作者:
Brodzki J

文献摘要

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本文给出了Baum-Connes猜想的一个新的证明,证明了系数为任意第二可数的局部紧拓扑群,该拓扑群在有限维CAT(0)-立方空间上适当地和余紧地起作用.证明使用了前三位作者提出的CAT(0)-立方空间的Julg-Valette复形和后一位作者发展的Kasparov理论中的直接分裂方法。
We give a new proof of the Baum–Connes conjecture with coefficients for any second countable, locally compact topological group that acts properly and cocompactly on a finite-dimensional CAT(0)-cubical space with bounded geometry. The proof uses the Julg–Valette complex of a CAT(0)-cubical space introduced by the 1st three authors and the direct splitting method in Kasparov theory developed by the last author.