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arXiv · 2508.02285

Gerstenhaber type structures on Davydov-Yetter cohomology with coefficients

Mamta Balodi·Abhishek Banerjee·Surjeet Kour
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Abstract

We obtain Gerstenhaber type structures on Davydov-Yetter cohomology with coefficients in half-braidings for a monoidal functor. Our approach uses a formal analogy between half-braidings of a monoidal functor and the entwining of a coalgebra with an algebra. We show that the Davydov-Yetter complex with coefficients carries the structure of a weak comp algebra. In particular, it is equipped with two distinct cup product structures $\cup$ and $\sqcup$ which are related in a manner that replaces graded commutativity. By considering entwining structures in the centralizer of the monoidal functor, we introduce subcomplexes of the Davydov-Yetter complex with coefficients, which carry comp algebra structures. As a result, we obtain a graded commutative cup product and a graded Lie bracket on their cohomology which forms a Gerstenhaber algebra in the usual sense.

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BibTeXRIS

Mamta Balodi, Abhishek Banerjee, Surjeet Kour. 2025-08-04. Gerstenhaber type structures on Davydov-Yetter cohomology with coefficients. https://arxiv.org/abs/2508.02285

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