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For any cssc-crossed module a category is constructed, equipped with a structure and proved that this is a coherent categorical group. Together with a result of the previous paper, where to any categorical group the cssc-crossed module is…

Category Theory · Mathematics 2024-10-15 Tamar Datuashvili , Osman Mucuk , Nazmiye Alemdar , Tunçar Şahan

We obtain some fundamental results, as Bokstedt-Neeman Theorem and Grothendieck duality, about the derived category of modules on a finite ringed space. Then we see how these results are transfered to schemes in a simple way and generalized…

Algebraic Geometry · Mathematics 2019-04-16 Fernando Sancho de Salas , Juan Francisco Torres Sancho

We study $N$-differential graded ($NDG$) categories and their the derived categories. First, we introduce $N$-differential modules over an $NDG$ category $\mathcal{A}$. Then we show that the category $\mathsf{C}_{Ndg}(\mathcal{A})$ of…

Category Theory · Mathematics 2020-02-05 Jun-ichi Miyachi , Hiroshi Nagase}

Let $T$ be an infinitely generated tilting module of projective dimension at most one over an arbitrary associative ring $A$, and let $B$ be the endomorphism ring of $T$. In this paper, we prove that if $T$ is good then there exists a ring…

Representation Theory · Mathematics 2014-02-26 Hongxing Chen , Changchang Xi

Recollements of derived module categories are investigated, using a new technique, ladders of recollements, which are mutation sequences. The position in the ladder is shown to control whether a recollement restricts from unbounded to…

Representation Theory · Mathematics 2016-09-29 Lidia Angeleri H\" ugel , Steffen Koenig , Qunhua Liu , Dong Yang

We describe equivalence classes of exact indecomposable module categories over a finite graded tensor category. When applied to a pointed fusion category, our results coincide with the ones obtained in [S. Natale, On the equivalence of…

Quantum Algebra · Mathematics 2020-04-10 Adriana Mejía Castaño , Martín Mombelli

We establish the feasibility of investigating the theory of $R\text{-}\mathrm{Mod}$-enriched categories, for any commutative and unitary ring $R$, through the framework of $\mathbb{A}\mathrm{b}$-enriched category theory. In particular, we…

Category Theory · Mathematics 2024-06-25 Matteo Doni

We present a method to construct new tilting complexes from existing ones using tensor products, generalizing a result of Rickard. The endomorphism rings of these complexes are generalized matrix rings that are "componentwise" tensor…

Representation Theory · Mathematics 2013-02-19 Sefi Ladkani

In the context of infinity categories, we rethink the notion of derived functor in terms of correspondences. This is especially convenient for the description of a passage from an adjoint pair (F,G) of functors to a derived adjoint pair…

Category Theory · Mathematics 2020-03-25 V. Hinich

In these notes, an introduction to derived categories and derived functors is given. The main focus is the bounded derived category of coherent sheaves on a smooth projective variety.

Algebraic Geometry · Mathematics 2019-08-29 Andreas Hochenegger

We outline the theory of reflections for prederivators, derivators and stable derivators. In order to parallel the classical theory valid for categories, we outline how reflections can be equivalently described as categories of fractions,…

Category Theory · Mathematics 2018-02-23 Fosco Loregian

This paper studies the existence of and compatibility between derived change of ring, balanced product, and function module derived functors on module categories in monoidal model categories.

Algebraic Topology · Mathematics 2007-10-01 L. Gaunce Lewis , Michael A. Mandell

This is the fourth (and last) prepublication version of a book on derived categories, that will be published by Cambridge University Press. The purpose of the book is to provide solid foundations for the theory of derived categories, and to…

Category Theory · Mathematics 2020-01-07 Amnon Yekutieli

The feasibility of a classification-by-rank program for modular categories follows from the Rank-Finiteness Theorem. We develop arithmetic, representation theoretic and algebraic methods for classifying modular categories by rank. As an…

Quantum Algebra · Mathematics 2016-03-23 Paul Bruillard , Siu-Hung Ng , Eric C. Rowell , Zhenghan Wang

This paper focuses on defining an analog of differential-graded triangular matrix algebra in the context of differential-graded categories. Given two dg-categories $\mathcal{U}$ and $\mathcal{T}$ and $M \in \text{DgMod}(\mathcal{U} \otimes…

Representation Theory · Mathematics 2024-09-11 M. Lizbeth Shaid Sandoval Miranda , Valente Santiago Vargas , Edgar O. Velasco Páez

We introduce a new categorical framework for studying derived functors, and in particular for comparing composites of left and right derived functors. Our central observation is that model categories are the objects of a double category…

Category Theory · Mathematics 2011-03-01 Michael Shulman

In this article, we will show that the category of biset functors can be regarded as a reflective monoidal subcategory of the category of Mackey functors on the 2-category of finite groupoids. This reflective subcategory is equivalent to…

Category Theory · Mathematics 2016-01-26 Hiroyuki Nakaoka

In the first part of this series of papers we constructed dg analogues of the Zuckerman functors over commutative rings and the dual Zuckerman functors over the field of complex numbers. In this paper we construct their derived functors in…

Category Theory · Mathematics 2016-06-15 Takuma Hayashi

We prove a Noether-Deuring theorem for the derived category of bounded complexes of modules over a Noetherian algebra.

Representation Theory · Mathematics 2012-01-16 Alexander Zimmermann

In this paper we continue the study of triangular matrix categories $\mathbf{\Lambda}=\left[ \begin{smallmatrix} \mathcal{T} & 0 \\ M & \mathcal{U} \end{smallmatrix}\right]$ initiated in [21]. First, given an additive category $\mathcal{C}$…

Category Theory · Mathematics 2019-03-12 Alicia León-Galeana , Martín Ortiz-Morales , Valente Santiago Vargas