Graded cluster algebras
Abstract
In the cluster algebra literature, the notion of a graded cluster algebra has been implicit since the origin of the subject. In this work, we wish to bring this aspect of cluster algebra theory to the foreground and promote its study. We transfer a definition of Gekhtman, Shapiro and Vainshtein to the algebraic setting, yielding the notion of a multi-graded cluster algebra. We then study gradings for finite type cluster algebras without coefficients, giving a full classification. Translating the definition suitably again, we obtain a notion of multi-grading for (generalised) cluster categories. This setting allows us to prove additional properties of graded cluster algebras in a wider range of cases. We also obtain interesting combinatorics---namely tropical frieze patterns---on the Auslander--Reiten quivers of the categories.
Cite
@article{arxiv.1309.6170,
title = {Graded cluster algebras},
author = {Jan E. Grabowski},
journal= {arXiv preprint arXiv:1309.6170},
year = {2015}
}
Comments
23 pages, 6 figures. v2: Substantially revised with additional results. New section on graded (generalised) cluster categories. v3: added Prop. 5.5 on relationship with Grothendieck group of cluster category