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Related papers: Some applications of extriangulated categories

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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

The Hom closed colocalizing subcategories of the stable module category of a finite group are classified. Along the way, the colocalizing subcategories of the homotopy category of injectives over an exterior algebra, and the derived…

Representation Theory · Mathematics 2011-02-15 Dave Benson , Srikanth B. Iyengar , Henning Krause

We introduce a notion similar to the AB4 (resp. AB4{*}) condition for abelian categories but in the context of extriangulated categories. We will refer to this notion as AET4 (resp. AET4{*}). One of our main results shows equivalent…

Category Theory · Mathematics 2025-11-14 Alejandro Argudín-Monroy , Octavio Mendoza , Carlos E. Parra

We extend results of Br\"ustle-Yang on ideal quotients of 2-term subcategories of perfect derived categories of non-positive dg algebras to a relative setting. We find a new interpretation of such quotients: they appear as prototypical…

Representation Theory · Mathematics 2024-01-22 Xin Fang , Mikhail Gorsky , Yann Palu , Pierre-Guy Plamondon , Matthew Pressland

The most commonly known triangulated categories arise from chain complexes in an abelian category by passing to chain homotopy classes or inverting quasi-isomorphisms. Such examples are called `algebraic' because they originate from abelian…

Algebraic Topology · Mathematics 2025-11-05 Stefan Schwede

In order to apply nonstandard methods to questions of algebraic geometry we continue our investigation from "Enlargements of categories" (Theory Appl. Categ. 14 (2005), No. 16, 357--398) and show how important homotopical constructions…

Category Theory · Mathematics 2008-07-08 Lars Brünjes , Christian Serpé

We derive an algorithm for mutating quivers of 2-CY tilted algebras that have loops and 2-cycles, under certain specific conditions. Further, we give the classification of the 2-CY tilted algebras coming from standard algebraic 2-CY…

Representation Theory · Mathematics 2010-04-26 Marco Angel Bertani-Økland , Steffen Oppermann

We construct combinatorial model category structures on the categories of (marked) categories and (marked) pre-additive categories, and we characterize (marked) additive categories as fibrant objects in a Bousfield localization of…

Algebraic Topology · Mathematics 2021-05-28 Ulrich Bunke , Alexander Engel , Daniel Kasprowski , Christoph Winges

We give a characterisation of those local not necessary commutative rings, for which the category of projective modules admits a triangulation with the identity as translation functor. By "admits a triangulation" we mean that the category…

Category Theory · Mathematics 2009-12-24 Boryana Dimitrova

We consider three categories arising from the higher Auslander algebras of type $A$ in relation to $d$-dimensional cluster combinatorics: $d$-exact subcategory of the module category of $A^d_{n+1}$ generated by the $d$-cluster-tilting…

Representation Theory · Mathematics 2026-05-27 Mikhail Gorsky , Nicholas J. Williams

Several important cases of vector bundles with extra structure (such as Higgs bundles and triples) may be regarded as examples of twisted representations of a finite quiver in the category of sheaves of modules on a variety/manifold/ringed…

Algebraic Geometry · Mathematics 2007-05-23 Peter B. Gothen , Alastair D. King

The development of cubical type theory inspired the idea of "extension types" which has been found to have applications in other type theories that are unrelated to homotopy type theory or cubical type theory. This article describes these…

Programming Languages · Computer Science 2024-02-08 Tesla Zhang

Hovey's correspondence between model structures and cotorsion pairs in the setting of abelian categories, has been generalized by Nakaoka-Palu, using two cotorsion pairs, to the setting of weakly idempotent complete extriangulated…

Representation Theory · Mathematics 2026-03-10 Jiangsheng Hu , Dongdong Zhang , Pu Zhang , Panyue Zhou

We introduce and study several homological notions which generalise the discrete derived categories of D. Vossieck. As an application, we show that Vossieck discrete algebras have this property with respect to all bounded t-structures. We…

Representation Theory · Mathematics 2018-02-14 Nathan Broomhead , David Pauksztello , David Ploog

For every regular cardinal $\alpha$, we construct a cofibrantly generated Quillen model structure on a category whose objects are essentially DG categories which are stable under suspensions, cosuspensions, cones and $\alpha$-small sums.…

K-Theory and Homology · Mathematics 2007-05-23 Goncalo Tabuada

Higher Homotopy van Kampen Theorems allow the computation as colimits of certain homotopical invariants of glued spaces. One corollary is to describe homotopical excision in critical dimensions in terms of induced modules and crossed…

Algebraic Topology · Mathematics 2013-10-15 Ronald Brown , Rafael Sivera

We introduce the notion of noncompact (partial) silting and (partial) tilting sets and objects in any triangulated category D with arbitrary (set-indexed) coproducts. We show that equivalence classes of partial silting sets are in bijection…

Representation Theory · Mathematics 2018-07-05 Pedro Nicolas , Manuel Saorin , Alexandra Zvonareva

We establish a novel relation between the cluster categories associated with marked surfaces and the topological Fukaya categories of the surfaces. We consider a generalization of the triangulated cluster category of the surface by a…

Representation Theory · Mathematics 2024-02-15 Merlin Christ

In the terms of an `$n$-periodic derived category', we describe explicitly how the orbit category of the bounded derived category of an algebra with respect to powers of the shift functor embeds in its triangulated hull. We obtain a large…

Representation Theory · Mathematics 2015-10-14 Torkil Stai

In this paper we continue the project of generalizing tilting theory to the category of contravariant functors $Mod(C)$, from a skeletally small preadditive category $C$ to the category of abelian groups. We introduced the notion of a a…

Representation Theory · Mathematics 2015-10-02 R. Martinez-Villa , M. Ortiz-Morales