Necessary conditions for non-trivial first Γ0-equivariant Hochschild cohomology of kG and an isomorphism of Γ-equivariant Hochschild cohomology to kΓ-relative Ext are established for finite groups and fields of given characteristic.
Volume No.10 of Interscience Tracts in Pure and Appleid Mathematics
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Equivariant Hochschild cohomology of group algebras and relative $\operatorname{Ext}$
Necessary conditions for non-trivial first Γ0-equivariant Hochschild cohomology of kG and an isomorphism of Γ-equivariant Hochschild cohomology to kΓ-relative Ext are established for finite groups and fields of given characteristic.