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Tangent categories provide a categorical axiomatization of the tangent bundle. There are many interesting examples and applications of tangent categories in a variety of areas such as differential geometry, algebraic geometry, algebra, and…

Category Theory · Mathematics 2024-04-10 Sacha Ikonicoff , Marcello Lanfranchi , Jean-Simon Pacaud Lemay

We prove Steinebrunner's conjecture on the biequivalence between (colored) properads and labelled cospan categories. The main part of the work is to establish a 1-categorical, strict version of the conjecture, showing that the category of…

Category Theory · Mathematics 2023-08-21 Jonathan Beardsley , Philip Hackney

Auslander-Reiten duality for module categories is generalised to Grothendieck abelian categories that have a sufficient supply of finitely presented objects. It is shown that Auslander-Reiten duality amounts to the fact that the functor…

Representation Theory · Mathematics 2016-04-12 Henning Krause

The present note surveys my research related to generalizing notions of abelian group theory to non-commutative case and applying them particularly to investigate fundamental groups.

Algebraic Topology · Mathematics 2020-05-21 Katsuya Eda

By using only combinatorial data on two posets X and Y, we construct a set of so-called formulas. A formula produces simultaneously, for any abelian category A, a functor between the categories of complexes of diagrams over X and Y with…

Representation Theory · Mathematics 2007-06-25 Sefi Ladkani

This article is a generalization of a result in Quillen's note ``Module theory over non-unital rings'' giving a one-to-one correspondence between bilocalization of abelian categories of modules and idempotent ideals of the base ring.…

Category Theory · Mathematics 2026-05-29 Yuki Kato

The Mordell--Lang conjecture for abelian varieties states that the intersection of an algebraic subvariety $X$ with a subgroup of finite rank is contained in a finite union of cosets contained in $X$. In this article, we prove a uniform…

Number Theory · Mathematics 2026-03-27 Ziyang Gao , Tangli Ge , Lars Kühne

These informal notes are concerned with sums and averages in various situations in analysis.

Classical Analysis and ODEs · Mathematics 2010-08-17 Stephen Semmes

The notion of a subtractive category, recently introduced by the author, is a ``categorical version'' of the notion of a (pointed) subtractive variety of universal algebras, due to A. Ursini. We show that a subtractive variety $\C$, whose…

Category Theory · Mathematics 2007-05-23 Zurab Janelidze

In this paper, we explain how the abstract notion of a differential bundle in a tangent category provides a new way of thinking about the category of modules over a commutative ring and its opposite category. MacAdam previously showed that…

Category Theory · Mathematics 2023-12-19 G. S. H. Cruttwell , Jean-Simon Pacaud Lemay

Let C be an extriangulated category. We prove that two quotient categories of extriangu?lated categories induced by selforthogonal subcategories are equivalent to module categories by restriction of two functors E and Hom, respectively.…

Rings and Algebras · Mathematics 2024-08-27 Peiyu Zhang , Yiwen Shi , Dajun Liu , Li Wang , Jiaqun Wei

We present some results from classical homological algebra using the language of cotorsion theories in abelian categories. The results are a couple of foundational facts about homological dimension, the Kunneth formula and the universal…

Category Theory · Mathematics 2024-12-03 Alexandru Stanculescu

In this article we introduce the notion of cubical $(\omega,p)$-categories, for $p \in \mathbb N \cup \{\omega\}$. We show that the equivalence between globular and groupoid $\omega$-categories proven by Al-Agl, Brown and Steiner induces an…

Category Theory · Mathematics 2017-12-21 Maxime Lucas

In this work, we introduce a family of new equivalence relations among fusion categories that are less refined than the usual Morita equivalence. We obtain abelian groups by quotienting these new equivalence relations from the commutative…

Quantum Algebra · Mathematics 2025-11-05 Liang Kong , Yilong Wang , Hao Zheng

In this work, we fill the gap between the elementary quotient completion introduced by Maietti and Rosolini and the exact completion of a category with weak finite limits, as described by Carboni and Vitale. To achieve this, we generalize…

Category Theory · Mathematics 2025-05-07 Cipriano Junior Cioffo

(Quoted from the article) This article pursue the series, initiated by [Ric14], dedicated to Pulita's {\pi}-exponentials and p-adic differential equation of rank one with coefficients a polynomial in a ultrametric extension of the field of…

Number Theory · Mathematics 2017-06-06 Rodolphe Richard

We give an algebraic description of the structure of the analytic universal cover of a complex abelian variety which suffices to determine the structure up to isomorphism. More generally, we classify the models of theories of "universal…

Logic · Mathematics 2021-07-14 Martin Bays , Bradd Hart , Anand Pillay

In their 2012 paper, Bobadilla and Koll\'ar studied topological conditions which guarantee that a proper map of complex algebraic varieties is a topological or differentiable fibration. They also asked whether a certain finiteness property…

Algebraic Geometry · Mathematics 2022-06-20 Yongqiang Liu , Laurenţiu Maxim , Botong Wang

Linear categories naturally have several identification relations : isomorphisms, categorical equivalences and Morita equivalences. In this thesis, we construct the classifying stacks for these three relations ($\ukcatiso$, $\ukcateq$,…

Algebraic Geometry · Mathematics 2007-05-23 Mathieu Anel

We show the equivalence of two kinds of strict multiple category, namely the well known globular omega-categories, and the cubical omega-categories with connections.

Category Theory · Mathematics 2007-05-23 Fahd A. A. Al-Agl , Ronald Brown , Richard Steiner
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