Tensor product of Hopf bimodules over a group

Cibils, Claude

doi:10.1090/S0002-9939-97-03727-1

Tensor product of Hopf bimodules over a group
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Proc. Amer. Math. Soc. 125 (1997), 1315-1321 Request permission

Abstract:

We describe the monoidal structure of the category of Hopf bimodules of a finite group and we derive a surjective ring map from the Grothendieck ring of the category of Hopf bimodules to the center of the integral group ring. We consider analogous results for the multiplicative structure of the Hochschild cohomology.

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