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We generalize fundamental notions of higher algebra, traditionally developed within the $\infty$-category of spectra, to the broader setting of $t$-structured tensor triangulated $\infty$-categories ($ttt$-$\infty$-categories). Under a…

Category Theory · Mathematics 2026-04-09 Jiacheng Liang

The purpose of this book is to lay out certain aspects of descriptive set theory. After initially establishing notation and generalities we proceed to the following topics: partitions, semirings, rings, $\sigma$-rings, $\delta$-rings,…

Logic · Mathematics 2024-04-09 Garth Warner

Utilizing previously established results concerning costratification in relative tensor-triangular geometry, we classify the colocalizing subcategories of the singularity category of a locally hypersurface ring and then we generalize this…

Category Theory · Mathematics 2024-08-30 Charalampos Verasdanis

We develop the basic theory of geometrically closed rings as a generalisation of algebraically closed fields, on the grounds of notions coming from positive model theory and affine algebraic geometry. For this purpose we consider several…

Rings and Algebras · Mathematics 2013-09-24 Jean Berthet

We study the class of modules, called cosilting modules, which are defined as the categorical duals of silting module. Several characterizations of these modules and connections with silting modules are presented. We prove that Bazzoni…

Rings and Algebras · Mathematics 2017-03-01 Simion Breaz , Flaviu Pop

Let R be a commutative, noetherian, local ring. Topological Q-vector spaces modelled on full subcategories of the derived category of R are constructed in order to study intersection multiplicities.

Commutative Algebra · Mathematics 2007-05-23 Anders J. Frankild , Esben Bistrup Halvorsen

We establish a bijection between torsion pairs in the category of finite-dimensional modules over a finite-dimensional algebra A and pairs (Z, I) formed by a closed rigid set Z in the Ziegler spectrum of A and a set I of indecomposable…

Representation Theory · Mathematics 2024-03-04 Lidia Angeleri Hügel , Rosanna Laking , Francesco Sentieri

We introduce a new class of algebras, which we call cluster-tilted. They are by definition the endomorphism algebras of tilting objects in a cluster category. We show that their representation theory is very close to the representation…

Representation Theory · Mathematics 2020-12-21 Aslak Bakke Buan , Bethany Marsh , Idun Reiten

We establish that a category of fibrant objects (in the sense of Brown) admits a Dwyer-Kan homotopical calculus of right fractions. This is done using a homotopical calculus of cocycles, which is an auxiliary structure that can be defined…

Category Theory · Mathematics 2015-09-29 Zhen Lin Low

The notion of silting mutation was introduced by Iyama and the author. In this paper we mainly study silting mutation for self-injective algebras and prove that any representation-finite symmetric algebra is tilting-connected. Moreover we…

Representation Theory · Mathematics 2011-10-28 Takuma Aihara

We generalise $\tau$-cluster morphism categories to the setting of non-positive dg algebras with finite dimensional cohomology in all degrees. The compatibility of silting reduction with support $\tau$-tilting reduction will be an essential…

Representation Theory · Mathematics 2024-10-22 Erlend D. Børve

In this article we study the triangulated category of singularities associated with a non-commutative resolution of singularities. In particular, we give a complete description of this category in the case of a curve with nodal…

Algebraic Geometry · Mathematics 2012-05-18 Igor Burban , Martin Kalck

We study abelian localizations of triangulated categories induced by rigid contravariantly finite subcategories, and also triangulated structures on subfactor categories of triangulated categories. In this context we generalize recent…

Representation Theory · Mathematics 2013-05-13 Apostolos Beligiannis

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 classify the thick subcategories of an algebraic triangulated standard category with finitely many indecomposable objects.

Category Theory · Mathematics 2010-10-04 Claudia Köhler

This paper systematically develops a notion of regular sequences in the context of $R$-linear triangulated categories for a graded-commutative ring $R$. The notion has equivalent characterizations involving Koszul objects and local…

Commutative Algebra · Mathematics 2025-09-15 Antonia Kekkou , Janina C. Letz , Marc Stephan

We introduce a new class of graded rings extending the class of generalized Weyl algebras. These rings are orders in crossed products of the most general type, and we introduce their basic structure theory. We provide an extensive list of…

Rings and Algebras · Mathematics 2007-05-23 Erna Nauwelaerts , Freddy Van Oystaeyen

We study a non-pointed version of the notion of torsion theory in the framework of categories equipped with a posetal monocoreflective subcategory such that the coreflector inverts monomorphisms. We explore the connections of such torsion…

Category Theory · Mathematics 2026-04-09 Andrea Cappelletti , Andrea Montoli

We leverage the results of the prequel in combination with a theorem of D. Orlov to yield some results in Hodge theory of derived categories of factorizations and derived categories of coherent sheaves on varieties. In particular, we…

Algebraic Geometry · Mathematics 2014-05-14 Matthew Ballard , David Favero , Ludmil Katzarkov

This article is an expository account of the theory of twisted commutative algebras, which simply put, can be thought of as a theory for handling commutative algebras with large groups of linear symmetries. Examples include the coordinate…

Commutative Algebra · Mathematics 2012-09-25 Steven V Sam , Andrew Snowden
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