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We consider two algebras of curves associated to an oriented surface of finite type - the cluster algebra from combinatorial algebra, and the skein algebra from quantum topology. We focus on generalizations of cluster algebras and…

Geometric Topology · Mathematics 2025-03-18 Hiroaki Karuo , Han-Bom Moon , Helen Wong

We study the polygons defining the dominance order on $\mathbf{g}$-vectors in cluster algebras of rank 2.

Combinatorics · Mathematics 2022-11-10 Dylan Rupel , Salvatore Stella

It has been established in recent years how to approach acyclic cluster algebras of finite type using subword complexes. In this paper, we continue this study by describing the c- and g-vectors, and by providing a conjectured description of…

Combinatorics · Mathematics 2016-08-26 Sarah Brodsky , Christian Stump

We show that cluster algebras do not contain non-trivial units and that all cluster variables are irreducible elements. Both statements follow from Fomin and Zelevinsky's Laurent phenomenon. As an application we give a criterion for a…

Rings and Algebras · Mathematics 2013-05-10 Christof Geiß , Bernard Leclerc , Jan Schröer

In this paper, we show that the tilting modules over a cluster-tilted algebra $A$ lift to tilting objects in the associated cluster category $\mathcal{C}_H$. As a first application, we describe the induced exchange relation for tilting…

Representation Theory · Mathematics 2007-10-25 David Smith

We show that the quantum coordinate ring of the unipotent subgroup N(w) of a symmetric Kac-Moody group G associated with a Weyl group element w has the structure of a quantum cluster algebra. This quantum cluster structure arises naturally…

Quantum Algebra · Mathematics 2013-04-29 C. Geiss , B. Leclerc , J. Schröer

Holm and Jorgensen have shown the existence of a cluster structure on a certain category $D$ that shares many properties with finite type $A$ cluster categories and that can be fruitfully considered as an infinite analogue of these. In this…

Representation Theory · Mathematics 2014-12-03 Jan E. Grabowski , Sira Gratz

We give an introduction to the theory of cluster categories and cluster tilted algebras. We include some background on the theory of cluster algebras, and discuss the interplay with cluster categories and cluster tilted algebras.

Representation Theory · Mathematics 2010-12-30 Idun Reiten

For a Lie algebra L over an algebraically closed field of non-zero characteristic, every finite-dimensional L-module can be decomposed into a direct sum of submodules such that all composition factors of a summand have the same character.…

Rings and Algebras · Mathematics 2013-01-22 Donald W. Barnes

Each quiver appearing in a seed of a cluster algebra determines a corresponding group, which we call a cluster group, which is defined via a presentation. Grant and Marsh showed that, for quivers appearing in seeds of cluster algebras of…

Group Theory · Mathematics 2019-04-09 Isobel Webster

We propose a new framework for categorifying skew-symmetrizable cluster algebras. Starting from an exact stably 2-Calabi-Yau category C endowed with the action of a finite group G, we construct a G-equivariant mutation on the set of maximal…

Representation Theory · Mathematics 2015-09-04 Laurent Demonet

We classify mutation-finite cluster algebras with arbitrary coefficients of geometric type.

Combinatorics · Mathematics 2023-08-29 Anna Felikson , Pavel Tumarkin

We study $g$-vector cones in a cluster algebra defined from a weighted orbifold of rank $n$ introduced by Felikson, Shapiro and Tumarkin. We determine the closure of the union of the $g$-vector cones. It is equal to $\mathbb{R}^n$ except…

Combinatorics · Mathematics 2025-12-30 Toshiya Yurikusa

In a cluster algebra, a subset of initial cluster variables can be specialised in such a way that all elements of the resulting algebra become polynomial in the remaining variables.

Rings and Algebras · Mathematics 2026-04-01 Andrei Zabolotskii

The article gives a ring theoretic perspective on cluster algebras. Gei{\ss}-Leclerc-Schr\"oer prove that all cluster variables in a cluster algebra are irreducible elements. Furthermore, they provide two necessary conditions for a cluster…

Rings and Algebras · Mathematics 2012-10-05 Philipp Lampe

We study monoidal categorifications of certain monoidal subcategories $\mathcal{C}_J$ of finite-dimensional modules over quantum affine algebras, whose cluster algebra structures coincide and arise from the category of finite-dimensional…

Quantum Algebra · Mathematics 2019-04-03 Masaki Kashiwara , Myungho Kim , Se-jin Oh , Euiyong Park

The canonical bases of cluster algebras of finite types and rank 2 are given explicitly in \cite{CK2005} and \cite{SZ} respectively. In this paper, we will deduce $\mathbb{Z}$-bases for cluster algebras for affine types…

Representation Theory · Mathematics 2008-12-15 Ming Ding , Jie Xiao , Fan Xu

This paper focuses on the study of a new category of vector bundles. The objects of this category, called chiral vector bundles, are pairs given by a complex vector bundle along with one of its automorphisms. We provide a classification for…

Mathematical Physics · Physics 2018-01-16 Giuseppe De Nittis , Kiyonori Gomi

We study $C^*$-algebras arising from $C^*$-correspondences, which was introduced by the author. We prove the gauge-invariant uniqueness theorem, and obtain conditions for our $C^*$-algebras to be nuclear, exact, or satisfy the Universal…

Operator Algebras · Mathematics 2007-05-23 Takeshi Katsura

The construction of a C*-algebra of a differential groupoid is presented. It is shown that it defines a covariant functor from the category of differential groupoids in a sense of S. Zakrzewski to the category of C*-algebras.

Quantum Algebra · Mathematics 2007-05-23 Piotr Stachura