Graded braided commutativity in Hochschild cohomology
Abstract
We prove the graded braided commutativity of the Hochschild cohomology of with trivial coefficients, where is a braided Hopf algebra in the category of Yetter-Drinfeld modules over the group algebra of an abelian group, under some finiteness conditions on a projective resolution of as -bimodule. This is a generalization of a result by Mastnak, Pevtsova, Schauenburg and Witherspoon to a context which includes Nichols algebras such as the Jordan and the super Jordan plane. We prove this result by constructing a coduoid-up-to-homotopy structure on the aforementioned projective resolution in the duoidal category of chain complexes of -bimodules. We also prove that the Hochschild complex of a braided bialgebra in an arbitrary braided monoidal category is a cocommutative comonoid up to homotopy with the deconcatenation product which induces the cup product in Hochschild cohomology.
Keywords
Cite
@article{arxiv.2211.11985,
title = {Graded braided commutativity in Hochschild cohomology},
author = {Javier Cóppola and Andrea Solotar},
journal= {arXiv preprint arXiv:2211.11985},
year = {2022}
}
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37 pages