A geometric realization of the $m$-cluster categories of type $\widetilde{D_n}$

Abstract

We show that a subcategory of the $m$-cluster category of type $\widetilde{D_n}$ is isomorphic to a category consisting of arcs in an $(n-2)m$-gon with two central $(m-1)$-gons inside of it. We show that the mutation of colored quivers and $m$-cluster-tilting objects is compatible with the flip of an $(m+2)$-angulation. In the final part of this paper, we detail an example of a quiver of type $\widetilde{D_7}$.