Partial tilting modules over $m$-replicated algebras

Abstract

Let $A$ be a hereditary algebra over an algebraically closed field $k$ and $A^{(m)}$ be the $m$-replicated algebra of $A$. Given an $A^{(m)}$-module $T$, we denote by $\delta (T)$ the number of non isomorphic indecomposable summands of $T$. In this paper, we prove that a partial tilting $A^{(m)}$-module $T$ is a tilting $A^{(m)}$-module if and only if $\delta (T)=\delta (A^{(m)})$, and that every partial tilting $A^{(m)}$-module has complements. As an application, we deduce that the tilting quiver ${\mathcal{K}}_{A^{(m)}}$ of $A^{(m)}$ is connected. Moreover, we investigate the number of complements to almost tilting modules over duplicated algebras.

16 pages

References in corpus (1)

• Representation dimension of $m$-replicated algebras

Cited by in corpus (2)

• Representation dimension of $m$-replicated algebras
• Global dimensions of endomorphism algebras for generator-cogenerators over $m$-replicated algebras