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In this paper we introduce a new approach for organizing algebras of global dimension at most 2. We introduce the notion of cluster equivalence for these algebras, based on whether their generalized cluster categories are equivalent. We are…

Representation Theory · Mathematics 2012-03-08 Claire Amiot , Steffen Oppermann

We give an elementary introduction to the theory of triangulated categories covering their axioms, homological algebra in triangulated categories, triangulated subcategories, and Verdier localization. We try to use a minimal set of axioms…

K-Theory and Homology · Mathematics 2014-07-17 Tobias Fritz

We investigate the group gradings on the algebra of upper triangular matrices over an arbitrary field, viewed as a Lie algebra. These results were obtained a few years early by the same authors. We provide streamlined proofs, and present a…

Rings and Algebras · Mathematics 2021-03-23 Plamen Koshlukov , Felipe Yukihide Yasumura

In this paper, we consider $n$-perforated Yoneda algebras for $n$-angulated categories, and show that, under some conditions, $n$-angles induce derived equivalences between the quotient algebras of $n$-perforated Yoneda algebras. This…

Representation Theory · Mathematics 2012-04-10 Yiping Chen

This is the second in a series of papers laying the foundations for a differential graded approach to derived differential geometry (and other geometries in characteristic zero). In this paper, we extend the classical notion of a dg-algebra…

Algebraic Geometry · Mathematics 2012-12-18 David Carchedi , Dmitry Roytenberg

Surjective homological epimorphisms with stratifying kernel can be used to construct recollements of derived module categories. These `stratifying' recollements are derived from recollements of module categories. Can every recollement be…

Representation Theory · Mathematics 2016-06-28 Lidia Angeleri H\" ugel , Steffen Koenig , Qunhua Liu , Dong Yang

In this paper, we introduce the cofibrant derived category of a group algebra $kG$ and study its relation to the derived category of $kG$. We also define the cofibrant singularity category of $kG$, whose triviality characterizes the…

Category Theory · Mathematics 2025-12-30 Ioannis Emmanouil , Wei Ren

In this paper we explain certain systematic differences between algebraic and topological triangulated categories. A triangulated category is algebraic if it admits a differential graded model, and topological if it admits a model in the…

Algebraic Topology · Mathematics 2013-11-28 Stefan Schwede

We give a necessary and sufficient condition for a morphism between recollements of abelian categories to be an equivalence.

Category Theory · Mathematics 2007-05-23 Vincent Franjou , Teimuraz Pirashvili

Given a thick subcategory of a triangulated category, we define a colocalisation and a natural long exact sequence that involves the original category and its localisation and colocalisation at the subcategory. Similarly, we construct a…

Category Theory · Mathematics 2015-10-23 Hvedri Inassaridze , Tamaz Kandelaki , Ralf Meyer

We introduce extriangulated factorization systems in extriangulated categories and show that there exists a bijection between $s$-torsion pairs and extriangulated factorization systems. We also consider the gluing of $s$-torsion pairs and…

Category Theory · Mathematics 2025-07-08 Yan Xu , Haicheng Zhang , Zhiwei Zhu

In this paper, we discuss a relationship between representation theory of graded self-injective algebras and that of algebras of finite global dimension. For a positively graded self-injective algebra $A$ such that $A_0$ has finite global…

Representation Theory · Mathematics 2012-01-27 Kota Yamaura

We show that if a (not necessarily algebraic) triangulated category T contains an admissible hereditary abelian subcategory H, then we can lift the inclusion of H into T to a fully faithful triangle functor from the whole of the bounded…

Rings and Algebras · Mathematics 2016-12-21 Andrew Hubery

We investigate notions of support and cosupport for differential graded (DG) modules over DG algebras. We apply these notions to identify certain classes of derived functors that are able to detect triviality and isomorphisms in derived…

Commutative Algebra · Mathematics 2021-11-30 Keri Sather-Wagstaff

Comparing the bounded derived categories of an algebra and of the endomorphism algebra of a given support {\tau}-tilting module, we find a relation between the derived dimensions of an algebra and of the endomorphism algebra of a given…

Representation Theory · Mathematics 2020-12-08 Yingying Zhang

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

This paper lays the foundations of triangulated persistence categories (TPC), which brings together persistence modules with the theory of triangulated categories. As a result we introduce several measurements and metrics on the set of…

Algebraic Topology · Mathematics 2021-04-27 Paul Biran , Octav Cornea , Jun Zhang

We provide a technique to glue simple-minded collections along a recollement of Hom-finite Krull-Schmidt triangulated categories over a field. This gluing technique for simple-minded collections is shown to be compatible with those for…

Representation Theory · Mathematics 2024-02-19 Yongliang Sun , Yaohua Zhang

We introduce the notion of a prile of one-sided triangulated categories. Roughly speaking, a prile consists of two one-sided triangulated categories having a common full subcategory which inherits a pretriangulated structure from these…

Algebraic Topology · Mathematics 2014-09-02 Zhi-Wei Li

The notion of relative derived category with respect to a subcategory is introduced. A triangle-equivalence, which extends a theorem of Gao and Zhang [Gorenstein derived categories, \emph{J. Algebra} \textbf{323} (2010) 2041-2057] to the…

Category Theory · Mathematics 2014-10-15 Zhenxing Di , Xiaoxiang Zhang , Wei Ren , Jianlong Chen
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