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We shall show that the stable categories of graded Cohen-Macaulay modules over quotient singularities have tilting objects. In particular, these categories are triangle equivalent to derived categories of finite dimensional algebras. Our…

Representation Theory · Mathematics 2011-02-17 Osamu Iyama , Ryo Takahashi

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

In this article, we introduce the notion of cluster automorphism of a given cluster algebra as a $\ZZ$-automorphism of the cluster algebra that sends a cluster to another and commutes with mutations. We study the group of cluster…

Representation Theory · Mathematics 2014-02-26 Ibrahim Assem , Ralf Schiffler , Vasilisa Shramchenko

Let $G=SL(2,5)$ be the special linear group of $2 \times 2$-matrices with coefficients in the field with $5$ elements. We show that the principal block over a splitting field $K$ of characteristic two of the group algebra $KG$ has a…

Representation Theory · Mathematics 2021-01-26 Bernhard Böhmler , Rene Marczinzik

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

Let $A$ be the path algebra of a quiver of Dynkin type $\mathbb{A}_n$. The module category $\text{mod}\,A$ has a combinatorial model as the category of diagonals in a polygon $S$ with $n+1$ vertices. The recently introduced notion of almost…

Representation Theory · Mathematics 2024-10-08 Thomas Brüstle , Eric J. Hanson , Sunny Roy , Ralf Schiffler

We study the cluster algebras arising from cluster tubes with rank bigger than $1$. Cluster tubes are $2-$Calabi-Yau triangulated categories which contain no cluster tilting objects, but maximal rigid objects. Fix a certain maximal rigid…

Representation Theory · Mathematics 2017-05-17 Yu Zhou , Bin Zhu

We construct tilting modules over Jacobian algebras arising from knots. To a two-bridge knot $L[a_1,\ldots,a_n]$, we associate a quiver $Q$ with potential and its Jacobian algebra $A$. We construct a family of canonical indecomposable…

Representation Theory · Mathematics 2020-01-14 Ralf Schiffler , David Whiting

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 provide a far reaching derived equivalence classification of the cluster-tilted algebras of Dynkin type D and suggest standard forms for the derived equivalence classes. We believe that the classification is complete, but some subtle…

Representation Theory · Mathematics 2015-03-17 Janine Bastian , Thorsten Holm , Sefi Ladkani

We give the first example of a non-trivial cluster tilting module in a local finite dimensional algebra. To do this, we give an explicit calculation of the corresponding higher Auslander algebra by quiver and relations using the GAP-package…

Representation Theory · Mathematics 2025-05-20 Rene Marczinzik , Daniel Owens

Let Q be a finite quiver without oriented cycles, and let $\Lambda$ be the associated preprojective algebra. To each terminal representation M of Q (these are certain preinjective representations), we attach a natural subcategory $C_M$ of…

Representation Theory · Mathematics 2010-08-02 Christof Geiss , Bernard Leclerc , Jan Schröer

We give a complete classification of all algebras appearing as endomorphism algebras of maximal rigid objects in standard 2-Calabi-Yau categories of finite type. Such categories are equivalent to certain orbit categories of derived…

Representation Theory · Mathematics 2015-05-12 Aslak Bakke Buan , Yann Palu , Idun Reiten

We introduce the notion of mutation of $n$-cluster tilting subcategories in a triangulated category with Auslander-Reiten-Serre duality. Using this idea, we are able to obtain the complete classifications of rigid Cohen-Macaulay modules…

Representation Theory · Mathematics 2015-06-26 Osamu Iyama , Yuji Yoshino

We construct a new class of symmetric algebras of tame representation type that are also the endomorphism algebras of cluster tilting objects in 2-Calabi-Yau triangulated categories, hence all their non-projective indecomposable modules are…

Representation Theory · Mathematics 2019-03-12 Sefi Ladkani

We show that a tilting module over the endomorphism algebra of a cluster-tilting object in a 2-Calabi-Yau triangulated category lifts to a cluster-tilting object in this 2-Calabi-Yau triangulated category. This generalizes a recent work of…

Representation Theory · Mathematics 2007-12-29 Changjian Fu , Pin Liu

We prove that mutation of cluster-tilting objects in triangulated 2-Calabi-Yau categories is closely connected with mutation of quivers with potentials. This gives a close connection between 2-CY-tilted algebras and Jacobian algebras…

Representation Theory · Mathematics 2012-10-30 Aslak Bakke Buan , Osamu Iyama , Idun Reiten , David Smith

Among the mutation finite cluster algebras the tubular ones are a particularly interesting class. We show that all tubular (simply laced) cluster algebras are of exponential growth by two different methods: first by studying the…

Representation Theory · Mathematics 2013-08-13 Michael Barot , Christof Geiss , Gustavo Jasso

In this paper we study categories of tilting modules. Our starting point is the tilting modules for a reductive algebraic group G in positive characteristic. Here we extend the main result in [8] by proving that these tilting modules form a…

Representation Theory · Mathematics 2020-02-27 Henning Haahr Andersen

This paper shows a new phenomenon in higher cluster tilting theory. For each positive integer d, we exhibit a triangulated category C with the following properties. On the one hand, the d-cluster tilting subcategories of C have very simple…

Representation Theory · Mathematics 2015-04-22 Thorsten Holm , Peter Jorgensen