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Related papers: Finite mutation classes of coloured quivers

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We show that a subcategory of the $m$-cluster category of type $\tilde{D_n}$ 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…

Representation Theory · Mathematics 2021-10-01 Lucie Jacquet-Malo

We give an explicit description of the mutation classes of quivers of type \tilde{A}_n. Furthermore, we provide a complete classification of cluster tilted algebras of type \tilde{A}_n up to derived equivalence. We show that the bounded…

Representation Theory · Mathematics 2012-02-15 Janine Bastian

We classify the connected quivers with the property that all the quivers in their mutation class have the same number of arrows. These are the ones having at most two vertices, or the ones arising from triangulations of marked bordered…

Combinatorics · Mathematics 2011-04-05 Sefi Ladkani

We study properties of minimal mutation-infinite quivers. In particular we show that every minimal-mutation infinite quiver of at least rank 4 is Louise and has a maximal green sequence. It then follows that the cluster algebras generated…

Combinatorics · Mathematics 2016-10-27 John W. Lawson , Matthew R. Mills

We associate a coloured quiver to a rigid object in a Hom-finite 2-Calabi--Yau triangulated category and to a partial triangulation on a marked (unpunctured) Riemann surface. We show that, in the case where the category is the generalised…

Representation Theory · Mathematics 2020-12-21 Bethany Marsh , Yann Palu

We study the notion of positive and negative complexity of pairs of objects in cluster categories. The first main result shows that the maximal complexity occurring is either one, two or infinite, depending on the representation type of the…

Category Theory · Mathematics 2010-01-06 Petter Andreas Bergh , Steffen Oppermann

We characterize mutation-finite cluster algebras of rank at least 3 using positive semi-definite quadratic forms. In particular, we associate with every unpunctured bordered surface a positive semi-definite quadratic space $V$, and with…

Combinatorics · Mathematics 2021-01-22 Anna Felikson , John W. Lawson , Michael Shapiro , Pavel Tumarkin

We use semi-invariant pictures to prove two conjectures about maximal green sequences. First: if $Q$ is any acyclic valued quiver with an arrow $j\to i$ of infinite type then any maximal green sequence for $Q$ must mutate at $i$ before…

Representation Theory · Mathematics 2015-10-12 Thomas Brüstle , Stephen Hermes , Kiyoshi Igusa , Gordana Todorov

Let B be a cluster-tilted algebra. We prove that B is $\tau$-tilting finite if and only if B is representation-finite.

Representation Theory · Mathematics 2020-08-04 Stephen Zito

In our previous papers we introduced categorical invariants, which are, roughly speaking, sets of triangulated subcategories in a given triangulated category and their quotients. Here is extended the list of examples, where these sets are…

Category Theory · Mathematics 2019-07-31 George Dimitrov , Ludmil Katzarkov

This if the final paper in the seriesContinuous Quivers of Type $A$. In this part, we generalize existing geometric models of type $A$ cluster structures to the new $\mathbf E$-clusters introduced in part (III). We also introduce an…

Representation Theory · Mathematics 2025-06-19 Job Rock

The purpose of this paper is to give an explicit formula for the number of non-isomorphic cluster-tilted algebras of type $A_n$, by counting the mutation class of any quiver with underlying graph $A_n$. It will also follow that if $T$ and…

Representation Theory · Mathematics 2008-04-16 Hermund André Torkildsen

Cluster algebras, introduced by Fomin and Zelevinsky through the process of quiver mutation, have become central objects in modern algebra and geometry, linking combinatorial constructions with diverse mathematical domains such as…

Combinatorics · Mathematics 2025-12-10 Eric Bucher , Elizabeth Howard

We complete classification of mutation-finite cluster algebras by extending the technique derived by Fomin, Shapiro, and Thurston to skew-symmetrizable case. We show that for every mutation-finite skew-symmetrizable matrix a diagram…

Combinatorics · Mathematics 2019-10-25 Anna Felikson , Michael Shapiro , Pavel Tumarkin

We define several topological spaces whose points are quivers with a given infinite vertex set $X$. In the special case when $X$ is countably infinite, we show that two of the spaces of interest are homeomorphic to the Baire space…

Combinatorics · Mathematics 2026-04-21 Benjamin Grant

Let $A$ be a finite dimensional hereditary algebra over an algebraically closed field $k$, $A^{(m)}$ be the $m$-replicated algebra of $A$ and $\mathscr{C}_{m}(A)$ be the $m$-cluster category of $ A$. We investigate properties of complements…

Representation Theory · Mathematics 2013-01-24 Hongbo Lv , Shunhua Zhang

Perfect colourings of the rings of cyclotomic integers with class number one are studied. It is shown that all colourings induced by ideals (q) are chirally perfect, and vice versa. A necessary and sufficient condition for a colouring to be…

Group Theory · Mathematics 2012-02-22 E. P. Bugarin , M. L. A. N. de las Peñas , D. Frettlöh

We construct finite volume hyperbolic manifolds with large symmetry groups. The construction makes use of the presentations of finite Coxeter groups provided by Barot and Marsh and involves mutations of quivers and diagrams defined in the…

Geometric Topology · Mathematics 2019-10-25 Anna Felikson , Pavel Tumarkin

Let k be a field of arbitrary characteristic and let Q be a quiver of finite representation type. In this paper we prove that if M is an indecomposable kQ-module then the universal deformation ring of M over kQ is isomorphic to k.

Representation Theory · Mathematics 2016-04-05 Roberto C. Soto , Daniel J. Wackwitz

Let $\tilde{Q}$ (resp. $Q$) be an extended exchange (resp. exchange) cluster quiver of finite mutation type. We introduce the distribution set of the number of arrows for $Mut[\tilde{Q}]$ (resp. $Mut[Q]$), give the maximum and minimum…

Representation Theory · Mathematics 2021-05-25 Qiuning Du , Fang Li , Jie Pan