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arXiv math/0608626math.KT
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全不连通的群的Chern character

Chern character for totally disconnected groups

Christian Voigt

摘要:

在Baum和Schneider意义下,本文构造了值为双变等变上同调的全不连通的群的等变KK-理论的双变Chern特征标.特别地,我们证明了对于一个全不连通的群,Baum-Connes猜想的复化左边同构于上同调.此外,还证明了我们的变换推广了Baum和Schneider定义的投射有限群的Chern特征标.

英文摘要:

In this paper we construct a bivariant Chern character for the equivariant KK-theory of a totally disconnected group with values in bivariant equivariant cohomology in the sense of Baum and Schneider. We prove in particular that the complexified left hand side of the Baum-Connes conjecture for a totally disconnected group is isomorphic to cosheaf homology. Moreover, it is shown that our transformation extends the Chern character defined by Baum and Schneider for profinite groups.

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