A geometric model for cluster categories of type Dn
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- Schiffler, R. J Algebr Comb (2008) 27: 1. doi:10.1007/s10801-007-0071-6
We give a geometric realization of cluster categories of type Dn using a polygon with n vertices and one puncture in its center as a model. In this realization, the indecomposable objects of the cluster category correspond to certain homotopy classes of paths between two vertices.