Intermediaries in Bredon (Co)homology and Classifying Spaces

Details Intermediaries in Bredon (Co)homology and Classifying Spaces Intermediaries in Bredon (Co)homology and Classifying Spaces

2011-04-13

arxiv.org/abs/1104.2539v1

Mathematics

Algebraic Topology

18 pages

Scientific paper

For certain contractible G-CW-complexes and F a family of subgroups of G, we construct a spectral sequence converging to the F-Bredon cohomology of G with E1-terms given by the F-Bredon cohomology of the stabilizer subgroups. As applications, we obtain several corollaries concerning the cohomological and geometric dimensions of the classifying space for the family F. We also introduce a hierarchically defined class of groups which contains all countable elementary amenable groups and countable linear groups of characteristic zero, and show that if a group G is in this class, then G has finite F-Bredon (co)homological dimension if and only if G has jump F-Bredon (co)homology.

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