Abstract
We develop the notion of a cohomology ring of blocks of finite groups and study its basic properties by means of transfer maps between the Hochschild cohomology rings of symmetric algebras associated with bounded complexes of finitely generated bimodules which are projective on either side.
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Linckelmann, M. Transfer in Hochschild Cohomology of Blocks of Finite Groups. Algebras and Representation Theory 2, 107–135 (1999). https://doi.org/10.1023/A:1009979222100
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DOI: https://doi.org/10.1023/A:1009979222100