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The additivity theorem for derivateurs associated to complicial biWaldhausen categories is proved. Also, to any exact category in the sense of Quillen a K-theory space is associated. This K-theory is shown to satisfy the additivity,…

K理论与同调 · 数学 2007-05-23 Grigory Garkusha

We explore several model-theoretic aspects of D-sets, which were studied in detail by Adeleke and Neumann. We characterize ultrahomogeneity in the class of colored D-sets and classify unbounded order-indiscernible sequences in such…

逻辑 · 数学 2025-02-28 Felipe Estrada , John Goodrick

We construct an adjunction between $m$-categories internal to $(\infty,n)$-categories, called $(n,m)$-double $\infty$-categories, and filtrations $A_0\to \dots\to A_m$ where for all $i<m$, $A_i$ is a $(n+i)$-category. We show that this…

范畴论 · 数学 2025-03-26 Félix Loubaton

Let $A$ be a proper non-positive dg algebra over a field $k$. For a simple-minded collection of the finite-dimensional derived category $\mathcal{D}_{fd}(A)$, we construct a 'dual' silting object of the perfect derived category…

表示论 · 数学 2021-05-11 Houjun Zhang

We prove the (equivariant) noetherian property for a wide class of varieties generalizing the class of Plucker varieties (Theorem 1). It improves previous results of Draisma-Eggermont who treated the case of bounded Plucker varieties. Key…

代数几何 · 数学 2020-08-24 Ilia Nekrasov

Let $\mathcal{A}$ be an abelian length category containing a $d$-cluster tilting subcategory $\mathcal{M}$. We prove that a subcategory of $\mathcal{M}$ is a $d$-torsion class if and only if it is closed under $d$-extensions and…

We prove the non-commutative analogue of Grothendieck's Standard Conjecture D for the dg-category of matrix factorizations of an isolated hypersurface singularity in characteristic 0. Along the way, we show the Euler pairing for such…

代数几何 · 数学 2020-03-05 Michael K. Brown , Mark E. Walker

The embedded cobordism category under study in this paper generalizes the category of conformal surfaces, introduced by G. Segal in order to formalize the concept of field theories. Our main result identifies the homotopy type of the…

代数拓扑 · 数学 2010-09-23 Soren Galatius , Ib Madsen , Ulrike Tillmann , Michael Weiss

This paper analyzes a possible link between Category Theory and Generalized Factorization Theory developed by Anderson and Frazier. Specifically in the context of what has been worked on in previous works, where compositions of relations…

范畴论 · 数学 2020-07-02 David Fernando Méndez Oyuela

Riehl and Shulman introduced simplicial type theory (STT), a variant of homotopy type theory which aimed to study not just homotopy theory, but its fusion with category theory: $(\infty,1)$-category theory. While notoriously technical,…

计算机科学中的逻辑 · 计算机科学 2025-12-12 Daniel Gratzer , Jonathan Weinberger , Ulrik Buchholtz

We introduce the notion of inductive category in a model category and prove that it agrees with the Ganea approach given by Doeraene. This notion also coincides with the topological one when we consider the category of (well-) pointed…

代数拓扑 · 数学 2009-02-28 J. M. Garcia-Calcines , P. R. Garcia-Diaz

We propose a categorification of the Dowker duality theorem for relations. Dowker's theorem states that the Dowker complex of a relation $R \subseteq X \times Y$ of sets $X$ and $Y$ is homotopy equivalent to the Dowker complex of the…

代数拓扑 · 数学 2023-03-29 Morten Brun , Marius Gårdsmann Fosse , Lars M. Salbu

The paper relates character value of an irreducible representation of a compact connected Lie group at certain elements of finite order with the dimension of a representation on another group, up to some precise constants, which all have…

表示论 · 数学 2025-04-22 Santosh Nadimpalli , Santosha Pattanayak , Dipendra Prasad

We give a proof of a conjecture of P. Schapira and J.-P. Schneiders on the characteristic classes of D-modules.

alg-geom · 数学 2008-02-03 P. Bressler , R. Nest , B. Tsygan

We do three things in this paper: (1) study the analog of localization sequences (in the sense of algebraic $K$-theory of stable $\infty$-categories) for additive $\infty$-categories, (2) define the notion of nilpotent extensions for…

K理论与同调 · 数学 2021-06-16 Elden Elmanto , Vladimir Sosnilo

Reflexive dg categories were introduced by Kuznetsov and Shinder to abstract the duality between bounded and perfect derived categories. In particular this duality relates their Hochschild cohomologies, autoequivalence groups, and…

表示论 · 数学 2025-12-12 Matt Booth , Isambard Goodbody , Sebastian Opper

In this paper we prove an $\infty$-categorical version of the reflection theorem of Ad\'amek-Rosick\'y. Namely, that a full subcategory of a presentable $\infty$-category which is closed under limits and $\kappa$-filtered colimits is a…

代数拓扑 · 数学 2022-07-20 Shaul Ragimov , Tomer M. Schlank

In this paper, we introduce a class of Dirichlet series defined in terms of the Riemann zeta-function, motivated by the study of their special values, and establish integral representations for these series. We also define an extension of…

数论 · 数学 2026-02-17 Takumi Noda

We introduce the notions of $\tau$-exceptional and signed $\tau$-exceptional sequences for any finite dimensional algebra. We prove that for a fixed algebra of rank $n$, and for any positive integer $t \leq n$, there is a bijection between…

表示论 · 数学 2021-06-04 Aslak Bakke Buan , Bethany Marsh

In this paper, we initiate the study of higher-dimensional Auslander-Reiten theory of self-injective algebras. We give a systematic construction of (weakly) $d$-representation-finite self-injective algebras as orbit algebras of the…

表示论 · 数学 2020-04-02 Erik Darpö , Osamu Iyama