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Batalin-Vilkovisky structure on Hochschild cohomology with coefficients in the dual algebra

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arxiv 1810.13023 v3 pith:G5UM2DWI submitted 2018-10-30 math.KT

classification math.KT
keywords algebracoefficientscohomologyhochschildbatalin-vilkoviskyalgebrasstructureadmits
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abstract

We prove that Hochschild cohomology with coefficients in $A^*=\Hom_k(A,k)$ under conditions on the algebra structure of $A^*$ is a Batalin-Vilkovisky algebra. We also show that for symmetric and Frobenius algebras, this recovers the known BV-structures in Hochschild cohomology with coefficients in $A$ but admits an easy-to-describe BV-operator. Finally, we show that for monomial algebras $A = kQ/\langle T \rangle$, the Hochschild cohomology with coefficients in $A^*$ is always a Batalin-Vilkovisky algebra.

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