Gerstenhaber algebra structure on the Hochschild cohomology ring of the Xu--Snashall algebra

Qi Long, Ziyang Shi, Guodong Zhou

Let $A$ be a finite dimensional algebra and let $\rmHH^*(A)$ be its Hochschild cohomology ring, which is a Gerstenhaber algebra. Denote by $\calN$ (resp. $G$, $\calG$) the ideal (r…