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Geometric Baum-Connes assembly map for twisted differentiable stacks - MaRDI portal

Geometric Baum-Connes assembly map for twisted differentiable stacks (Q2811180)

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scientific article; zbMATH DE number 6591558
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Geometric Baum-Connes assembly map for twisted differentiable stacks
scientific article; zbMATH DE number 6591558

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    10 June 2016
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    twisted K-theory
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    index theory
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    Lie groupoids and differentiable stacks
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    geometric Baum-Connes assembly map
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    twisted Lie groupoids
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    geometric deformation groupoids
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    Morita invariance
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    assembly map
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    Geometric Baum-Connes assembly map for twisted differentiable stacks (English)
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    The authors construct the geometric Baum-Connes assembly map for twisted Lie groupoids. For this construction, they use geometric deformation groupoids to give, in particular, a geometric construction of the associated pushforward maps and to establish the functoriality. The main results in this paper are the definition of the geometric twisted K-homology groups and the construction of the assembly map.NEWLINENEWLINEThe authors also prove the Morita invariance of the assembly map, obtaining in this way a precise meaning to the twisted geometric assembly map for differentiable stacks. This point is essential since, in practice, one usually changes the groupoid model by the Morita equivalent one.
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