Symmetric continuous cohomology of topological groups

Details Symmetric continuous cohomology of topological groups Symmetric continuous cohomology of topological groups

2011-05-26

arxiv.org/abs/1105.5218v2

Mathematics

Group Theory

21 pages

Scientific paper

In this paper, we introduce a symmetric continuous cohomology of topological groups. This is obtained by topologizing a recent construction due to Staic (J. Algebra 322 (2009), 1360-1378), where a symmetric cohomology of abstract groups is constructed. We give a characterization of topological group extensions that correspond to elements of the second symmetric continuous cohomology. We also show that the symmetric continuous cohomology of a profinite group with coefficients in a discrete module is equal to the direct limit of the symmetric cohomology of finite groups. In the end, we also define symmetric smooth cohomology of Lie groups and prove similar results.

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