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Gentle algebras are in bijection with admissible dissections of marked oriented surfaces. In this paper, we further study the properties of admissible dissections and we show that silting objects for gentle algebras are given by admissible…

Representation Theory · Mathematics 2019-04-12 Claire Amiot , Pierre-Guy Plamondon , Sibylle Schroll

In this paper, we investigate properties of the bounded derived category of finite dimensional modules over a gentle or skew-gentle algebra. We show that the Rouquier dimension of the derived category of such an algebra is at most one.…

Representation Theory · Mathematics 2017-06-27 Igor Burban , Yuriy Drozd

In this article we describe the triangulated structure of the bounded derived category of a gentle algebra by describing the triangles induced by the morphisms between indecomposable objects in a basis of their Hom-space.

Representation Theory · Mathematics 2020-01-27 Ilke Canakci , David Pauksztello , Sibylle Schroll

Combining results from Keller and Buchweitz, we describe the 1-periodic derived category of a finite dimensional algebra $A$ of finite global dimension as the stable category of maximal Cohen-Macaulay modules over some Gorenstein algebra…

Representation Theory · Mathematics 2025-06-25 Joseph Winspeare

In this article we describe indecomposable objects of the derived categories of a branch class of associative algebras. To this class belong such known classes of algebras as gentle algebras, skew-gentle algebras and certain degenerations…

Representation Theory · Mathematics 2016-09-07 Igor Burban , Yuriy Drozd

We study thick subcategories of derived categories of gentle algebras. Any thick subcategory of a derived category of a gentle algebra is generated by a set of string objects or a set of band objects. We show the thick subcategories…

Representation Theory · Mathematics 2025-02-18 Callum Page

In this paper we construct a geometric model for the triangulated category generated by the simple modules of any graded gentle algebra. This leads to a geometric model of their perfect derived categories and by a recent paper of Booth,…

Representation Theory · Mathematics 2025-07-11 Sebastian Opper , Pierre-Guy Plamondon , Sibylle Schroll

We use folding techniques to define a new class of gentle-like algebras that generalise the iterated tilted algebras of type $C$ and $\widetilde{C}$, which we call folded gentle algebras. We then show that folded gentle algebras satisfy…

Representation Theory · Mathematics 2025-03-28 Drew Damien Duffield

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

In this article we provide a simple combinatorial description of morphisms between indecomposable complexes in the bounded derived category of a gentle algebra.

Representation Theory · Mathematics 2015-01-23 Kristin Krogh Arnesen , Rosanna Laking , David Pauksztello

In this article, we realize skew-gentle algebras as skew-tiling algebras associated to admissible partial triangulations of punctured marked surfaces. Based on this, we establish a bijection between tagged permissible curves and certain…

Representation Theory · Mathematics 2023-04-05 Ping He , Yu Zhou , Bin Zhu

We study semiorthogonal decompositions of bounded derived categories of gentle algebras and how they are manifested in the geometric model of these categories as constructed by Opper, Plamondon and Schroll. We prove that there is a…

Representation Theory · Mathematics 2022-09-30 Jakub Kopřiva , Jan Šťovíček

We construct a weak representation of the category of framed affine tangles on a disjoint union of triangulated categories ${\mathcal D}_{2n}$. The categories we use are that of coherent sheaves on Springer fibers over a nilpotent element…

Algebraic Geometry · Mathematics 2016-02-09 Rina Anno

Skew-gentle algebras are skew-group algebras of certain gentle algebras endowed with a Z 2-action. Using the topological description of Opper, Plamondon and Schroll in [OPS] for the indecomposable objects of the derived category of any…

Representation Theory · Mathematics 2022-01-19 Claire Amiot

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

In Part 1, we classify (indecomposable) objects in the perfect derived category $\mathrm{per}\Lambda$ of a graded skew-gentle algebra $\Lambda$, generalizing technique/results of Burban-Drozd and Deng to the graded setting. We also use the…

Representation Theory · Mathematics 2024-03-25 Yu Qiu , Chao Zhang , Yu Zhou

Let $A$ be a finite dimensional algebra and $D^b(A)$ be the bounded derived category of finitely generated left $A$-modules. In this paper we consider lengths of compact exceptional objects in $D^b(A)$, proving a sufficient condition such…

Representation Theory · Mathematics 2016-05-04 Liping Li

In this paper we study the localization of a derived category of a graded gentle algebra by a subcategory generated by a spherical band object. This object corresponds to a simple closed curve under the equivalence between the perfect…

Representation Theory · Mathematics 2025-01-27 Pierre Bodin

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

A gentle algebra gives rise to a dissection of an oriented marked surface with boundary into polygons and the bounded derived category of the gentle algebra has a geometric interpretation in terms of this surface. In this paper we study…

Representation Theory · Mathematics 2021-07-29 Wen Chang , Sibylle Schroll
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