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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

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 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

The geometric models for the module category and derived category of any gentle algebra were introduced to realize the objects in module category and derived category by permissible curves and admissible curves respectively. The present…

Representation Theory · Mathematics 2023-08-15 Yu-Zhe Liu , Chao Zhang , Houjun Zhang

We classify gentle algebras defined by quivers with two cycles under derived equivalence in a non degenerate case, by using some combinatorial invariants constructed from the quiver with relations defining these algebras. We also present a…

Representation Theory · Mathematics 2008-08-15 Diana Avella-Alaminos

We consider a natural generalisation of symmetric Nakayama algebras, namely, symmetric special biserial algebras with at most one non-uniserial indecomposable projective module. We describe the basic algebras explicitly by quiver and…

Representation Theory · Mathematics 2013-10-14 Nicole Snashall , Rachel Taillefer

We investigate the role of gentle algebras in higher homological algebra. In the first part of the paper, we show that if the module category of a gentle algebra $\Lambda$ contains a $d$-cluster tilting subcategory for some $d \geq 2$, then…

Representation Theory · Mathematics 2022-05-02 Johanne Haugland , Karin M. Jacobsen , Sibylle Schroll

We prove that every finite dimensional algebra over an algebraically closed field is either derived tame or derived wild. We also prove that any deformation of a derived tame algebra is derived tame.

Representation Theory · Mathematics 2007-05-23 Yuriy A. Drozd

The Nakayama permutations of two derived equivalent, self-injective Artin algebras are conjugate. A different but elementary approach is given to showing that the weak symmetry and self-injectivity of finite-dimensional algebras over an…

Representation Theory · Mathematics 2024-10-29 Changchang Xi , Jin Zhang

Let $A$ be a graded algebra. It is shown that the derived category of dg modules over $A$ (viewed as a dg algebra with trivial differential) is a triangulated hull of a certain orbit category of the derived category of graded $A$-modules.…

Representation Theory · Mathematics 2017-11-27 Martin Kalck , Dong Yang

We introduce a derived representation scheme associated with a quiver, which may be thought of as a derived version of a Nakajima variety. We exhibit an explicit model for the derived representation scheme as a Koszul complex and by doing…

K-Theory and Homology · Mathematics 2020-06-17 Stefano D'Alesio

We determine derived representation type of complete finitely generated local and two-point algebras over an algebraically closed field.

Representation Theory · Mathematics 2008-12-31 Viktor Bekkert , Yuriy Drozd , Vyacheslav Futorny

Enomoto showed for finite dimensional algebras that the classification of exact structures on the category of finitely generated projective modules can be reduced to the classification of 2-regular simple modules. In this article, we give a…

Combinatorics · Mathematics 2020-07-15 Rene Marczinzik , Martin Rubey , Christian Stump

Let $A$ be a Nakayama algebra. We give a description of the singularity category of $A$ inside its stable module category. We prove that there is a duality between the singularity category of $A$ and the singularity category of its opposite…

Representation Theory · Mathematics 2014-04-10 Dawei Shen

We prove smoothness in the dg sense of the bounded derived category of finitely generated modules over any finite-dimensional algebra over a perfect field, hereby answering a question of Iyama. More generally, we prove this statement for…

Algebraic Geometry · Mathematics 2019-03-25 Alexey Elagin , Valery A. Lunts , Olaf M. Schnürer

We study the relation between simple-minded systems and two-term tilting complexes for self-injective Nakayama algebras. More precisely, we show that any simple-minded system of a self-injective Nakayama algebra is the image of the set of…

Representation Theory · Mathematics 2014-02-25 Aaron Chan

We give a complete classification of all $d$-representation-finite symmetric Nakayama algebras and of all $d$-representation-finite trivial extensions of path algebras of quivers, over an arbitrary field. As a consequence we get a…

Representation Theory · Mathematics 2026-04-08 Erik Darpö , Tor Kringeland

We classify, up to derived (equivalently, tilting-cotilting) equivalence all nondegenerate gentle two-cycle algebras. We also give a partial classification and formulate a conjecture in the degenerate case.

Representation Theory · Mathematics 2007-10-23 Grzegorz Bobinski , Piotr Malicki

In this paper, we construct derived equivalences between certain Nakayama algebras by using the notion of an S-family which is a family of objects in a triangulated category satisfying some axioms.

Rings and Algebras · Mathematics 2023-02-07 Taro Ueda

We introduce the notion of a Nakajima bundle representation. Given a labelled quiver and a variety or manifold $X$, such a representation involves an assignment of a complex vector bundle on $X$ to each node of the doubled quiver; to the…

Algebraic Geometry · Mathematics 2026-04-28 Lisa Jeffrey , Matthew Koban , Steven Rayan
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