The hochschild cohomology ring of a cyclic block
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Suppose B is a block of a group algebra kG with cyclic defect group. We calculate the Hochschild cohomology ring of B, giving a complete set of generators and relations. We then show that if D is the principal block, the canonical map from H*(G, k) to the Hochschild cohomology ring of B induces an isomorphism modulo radicals. 2000 American Mathematical Society.
Proceedings of the American Mathematical Society
author list (cited authors)
Siegel, S. F., & Witherspoon, S. J.
complete list of authors
Siegel, SF||Witherspoon, SJ