Cluster categories and duplicated algebras

Details Cluster categories and duplicated algebras Cluster categories and duplicated algebras

2005-09-21

arxiv.org/abs/math/0509501v1

Mathematics

Representation Theory

16 pages

Scientific paper

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 $\bar{A}$.

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