# Cluster categories and duplicated algebras

Research paper by Ibrahim Assem, Thomas Brüstle, Ralf Schiffler, Gordana Todorov

Indexed on: 21 Sep '05Published on: 21 Sep '05Published in: Mathematics - Representation Theory

#### Abstract

Let $A$ be a hereditary algebra. We construct a fundamental domain for the cluster category of $A$ inside the category of modules over the duplicated algebra $\bar{A}$ of $A$. We then prove that there exists a bijection between the tilting objects in the cluster category and the tilting $\bar{A}$-modules all of whose non projective-injective indecomposable summands lie in the left part of the module category of $\bar{A}$.