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In this paper we determine the derived representation type of quadratic string algebras and we prove that every derived tame quadratic string algebra whose quiver has cycles is derived equivalent to some skewed-gentle algebra.

Representation Theory · Mathematics 2020-11-17 Marlon Pimenta Fonseca

We study the equivalences induced by some special silting objects in the derived category over dg-algebra whose positive cohomologies are all zero.

Representation Theory · Mathematics 2023-02-14 Simion Breaz , George Ciprian Modoi

In this article, gentle algebras are realised as tiling algebras, which are associated to partial triangulations of unpunctured surfaces with marked points on the boundary. This notion of tiling algebras generalise the notion of Jacobian…

Representation Theory · Mathematics 2018-03-16 Karin Baur , Raquel Coelho Simoes

For a finite-dimensional gentle algebra, it is already known that the functorially finite torsion classes of its category of finite-dimensional modules can be classified using a combinatorial interpretation, called maximal non-crossing sets…

Representation Theory · Mathematics 2020-09-23 Aaron Chan , Laurent Demonet

We determine the derived representation type of Nakayama algebras and prove that a derived tame Nakayama algebra without simple projective module is gentle or derived equivalent to some skewed-gentle algebra, and as a consequence, we…

Representation Theory · Mathematics 2019-10-04 Viktor Bekkert , Hernan Giraldo , Jose A. Velez-Marulanda

We customize the existing models for the bounded derived category of gentle algebras to obtain simple graph theoretic tools to analyze indecomposable objects, Auslander-Reiten triangles, and their interaction with the associated homological…

Representation Theory · Mathematics 2025-02-05 Jesús Arturo Jiménez González , Andrzej Mróz

We classify all finite dimensional algebras which are derived equivalent to m-cluster tilted algebras of type A.

Representation Theory · Mathematics 2012-01-23 Juan Carlos Bustamante , Viviana Gubitosi

We prove that any derived equivalence between derived-discrete algebras of finite global dimension is standard, that is, isomorphic to the derived tensor functor by a two-sided tilting complex.

Representation Theory · Mathematics 2017-05-16 Xiao-Wu Chen , Chao Zhang

We classify gradings on matrix algebras by a finite abelian group. A grading is called good if all elementary matrices are homogeneous. For cyclic groups, all gradings on a matrix algebra over an algebraically closed field are good. We can…

Rings and Algebras · Mathematics 2007-05-23 S. Caenepeel , S. Dăscălescu , C. Năstăsescu

Skew-gentle algebras are skew-group algebras of gentle algebras equipped with a certain $\Z_2$-action. Building on the bijective correspondence between gentle algebras and dissected surfaces, we obtain in this paper a bijection between…

Representation Theory · Mathematics 2019-12-20 Claire Amiot , Thomas Brüstle

We study tilting complexes over preprojective algebras of Dynkin type. We classify all tilting complexes by giving a bijection between tilting complexes and the braid group of the corresponding folded graph. In particular, we determine the…

Representation Theory · Mathematics 2018-03-16 Takuma Aihara , Yuya Mizuno

We complete the derived equivalence classification of all symmetric algebras of polynomial growth, by solving the subtle problem of distinguishing the standard and nonstandard nondomestic symmetric algebras of polynomial growth up to…

Representation Theory · Mathematics 2010-09-08 Thorsten Holm , Andrzej Skowronski

We classify, up to isomorphism and up to equivalence, involutions on graded-division finite-dimensional simple real (associative) algebras, when the grading group is abelian.

Rings and Algebras · Mathematics 2018-02-13 Yuri Bahturin , Mikhail Kochetov , Adrián Rodrigo-Escudero

Skew-gentle algebras are a generalisation of the well-known class of gentle algebras with which they share many common properties. In this work, using non-commutative Gr\"obner basis theory, we show that these algebras are Koszul and that…

Representation Theory · Mathematics 2021-11-18 Daniel Labardini-Fragoso , Sibylle Schroll , Yadira Valdivieso

We call an $\mathbb{R}$-algebra locally complexified-gentle if it becomes a locally gentle $\mathbb{C}$-algebra up to Morita equivalence after complexification. We use modulated quivers to introduce two types of locally complexified-gentle…

Representation Theory · Mathematics 2026-01-14 Jie Li , Chao Zhang

This article is concerned with the derived representation theory of certain infinite-dimensional gentle algebras called gentle orders. For a gentle order, we provide a factorization of the derived Nakayama functor, study its fractionally…

Representation Theory · Mathematics 2025-02-21 Wassilij Gnedin

We use the maximal faces of the $m$-cluster complex of type A to describe the m-cluster tilted algebras of type A as quivers with relations. We then classify connected components of m-cluster tilted algebras of type A up to derived…

Representation Theory · Mathematics 2008-07-25 Graham J. Murphy

We assume given a smooth symplectic (in the algebraic sense) resolution $X$ of an affine algebraic variety $Y$, and we prove that, possibly after replacing $Y$ with an etale neighborhood of a point, the derived category of coherent sheaves…

Algebraic Geometry · Mathematics 2007-05-23 D. Kaledin

To every minimal model of a complete local isolated cDV singularity Donovan--Wemyss associate a finite dimensional symmetric algebra known as the contraction algebra. We construct the first known standard derived equivalences between these…

Representation Theory · Mathematics 2020-02-11 Jenny August

In this paper we produce noncommutative algebras derived equivalent to deformations of schemes with tilting bundles. We do this in two settings, first proving that a tilting bundle on a scheme lifts to a tilting bundle on an infinitesimal…

Algebraic Geometry · Mathematics 2015-05-18 Joseph Karmazyn