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math.KT2023
The Hochschild cohomology groups under gluing arrows
Yuming Liu, Lleonard Rubio y Degrassi, Can Wen
In a previous paper arXiv:2211.05435 we have compared the Hochschild cohomology groups of finite dimensional monomial algebras under gluing two idempotents. In the present paper, w…
math.KT2014★ 4 cited
Batalin-Vilkovisky structure over the Hochschild cohomology ring of a group algebra
Yu-Ming Liu, Guodong Zhou
We realize explicitly the well-known additive decomposition of the Hochschild cohomology ring of a group algebra in the elements level. As a result, we describe the cup product, th…