On Hochschild cohomology of a self-injective special biserial algebra obtained by a circular quiver with double arrows
Abstract
We calculate the dimensions of the Hochschild cohomology groups of a self-injective special biserial algebra s obtained by a circular quiver with double arrows. Moreover, we give a presentation of the Hochschild cohomology ring modulo nilpotence of s by generators and relations. This result shows that the Hochschild cohomology ring modulo nilpotence of s is finitely generated as an algebra.
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