$\tau$-exceptional sequences for representations of quivers over local algebras

Abstract

Let $k$ be an algebraically closed field. Let $R$ be a finite dimensional commutative local $k$-algebra and let $Q$ be a quiver with no oriented cycles. In this paper, we study (signed) $\tau$-exceptional sequences over the algebra $\Lambda =R\otimes kQ$, which is isomorphic to $RQ$. We show there is a bijection between the set of complete (signed) $\tau$-exceptional sequences in $\text{mod }kQ$ and the set of complete (signed) $\tau$-exceptional sequences in $\text{mod }\Lambda$. Moreover, we prove that every $\tau$-perpendicular subcategory of $\text{mod }\Lambda$ is equivalent to the module category of $R\otimes k{Q}^{\prime }$, for some quiver $Q^{\prime }$. As a consequence, we prove that the $\tau$-cluster morphism categories of $kQ$ and $\Lambda$ are equivalent.

39 pages. v2: Removed Proposition 5.2 and Corollary 5.12. Minor changes