Abstract:Abstract. Cluster algebras were introduced by S. Fomin and A. Zelevinsky in connection with dual canonical bases. Let U be a cluster algebra of type A n . We associate to each cluster C of U an abelian category C C such that the indecomposable objects of C C are in natural correspondence with the cluster variables of U which are not in C. We give an algebraic realization and a geometric realization of C C . Then, we generalize the "denominator theorem" of Fomin and Zelevinsky to any cluster.
IntroductionCluste… Show more
“…For d = 2, one obtains the cluster category associated with the Dynkin graph. This category was introduced in [27] for type A and in [6] in the general case. It serves in the representation-theoretic approach (cf.…”
Section: Theorem 412 ([156]) the Category Of Small Dg Categories Enmentioning
Abstract. Differential graded categories enhance our understanding of triangulated categories appearing in algebra and geometry. In this survey, we review their foundations and report on recent work by Drinfeld, Dugger-Shipley, . . . , Toën and Toën-Vaquié.
“…For d = 2, one obtains the cluster category associated with the Dynkin graph. This category was introduced in [27] for type A and in [6] in the general case. It serves in the representation-theoretic approach (cf.…”
Section: Theorem 412 ([156]) the Category Of Small Dg Categories Enmentioning
Abstract. Differential graded categories enhance our understanding of triangulated categories appearing in algebra and geometry. In this survey, we review their foundations and report on recent work by Drinfeld, Dugger-Shipley, . . . , Toën and Toën-Vaquié.
“…Following the spirit of [5] we now define minimal rotations between diagonals of r,s,t . Let k, l be non-neighbouring vertices of and let c ∈ {R, B, P}.…”
Section: Minimal Clockwise Rotationsmentioning
confidence: 99%
“…4.1. Let be the stable translation quiver of unoriented diagonals of , as defined in CalderoChapoton-Schiffler's paper [5]. Then there is a projection π 2 : 7 1,2 → , which maps…”
Section: Corollary 46 There Is a Dense And Full Functormentioning
confidence: 99%
“…Moreover, let be the stable translation quiver having as vertices the unoriented diagonals of and arrows given by minimal clockwise rotations, see [5] for details. 6 The support of Hom(τ −1 X, −) in C Q is called the front Ext-hammock of X .…”
Section: Combinatorics Of the Cluster Category C Ementioning
In this paper, we give a geometric-combinatorial description of the cluster categories of type E. In particular, we give an explicit geometric description of all cluster-tilting objects in the cluster category of type E 6 . The model we propose here arises from combining two polygons, and it generalizes the description of the cluster category of type A and D.
“…The definition of the cluster category is due to BuanMarsh-Reineke-Reiten-Todorov [5] (for arbitrary Q without oriented cycles) and, independently and with a very different, more geometric description, to Caldero-Chapoton-Schiffler [13] (for Q of type A n ).…”
Summary. This is a concise introduction to Fomin-Zelevinsky's cluster algebras and their links with the representation theory of quivers in the acyclic case. We review the definition cluster algebras (geometric, without coefficients), construct the cluster category and present the bijection between cluster variables and rigid indecomposable objects of the cluster category.
MSC 2010 classification: 18E30, 16S99
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