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We give an explicit proof of a Bogomolov-type inequality for $c_3$ of reflexive sheaves on $\mathbb{P}^3$. Then, using resolutions of rank-two reflexive sheaves on $\mathbb{P}^3$, we prove that some strata of the moduli of rank-two…

Algebraic Geometry · Mathematics 2014-01-20 Jason Lo , Ziyu Zhang

We provide a new and very short proof of the fact that a spherical functor between certain triangulated categories induces an autoequivalence.

Algebraic Geometry · Mathematics 2021-03-10 Ciaran Meachan

A different proof to a known criterion of derived equivalence implying birationality is given. Derived equivalent smooth projective curves over an algebraically closed field are proved to be isomorphic. A different proof of derived…

Algebraic Geometry · Mathematics 2011-08-10 Yu-Han Liu

Differential properties for orthogonal polynomials in several variables are studied. We consider multivariate orthogonal polynomials whose gradients satisfy some quasi--orthogonality conditions. We obtain several characterizations for these…

Classical Analysis and ODEs · Mathematics 2007-05-23 M. Alvarez de Morales , L. Fernández , T. E. Pérez , M. A. Piñar

In this work, we present new connections between three types of quantum states: positive under partial transpose states, symmetric with positive coefficients states and invariant under realignment states. First, we obtain a common upper…

Quantum Physics · Physics 2025-02-11 Daniel Cariello

For each object in a tensor triangulated category, we construct a natural continuous map from the object's support---a closed subset of the category's triangular spectrum---to the Zariski spectrum of a certain commutative ring of…

Category Theory · Mathematics 2013-09-17 Beren Sanders

Constellations are partial algebras that are one-sided generalisations of categories. It has previously been shown that the category of inductive constellations is isomorphic to the category of left restriction semigroups. Here we consider…

Category Theory · Mathematics 2015-10-21 Victoria Gould , Tim Stokes

We provide an axiomatic approach for studying support varieties of objects in a triangulated category via the action of a tensor triangulated category, where the tensor product is not necessarily symmetric. This is illustrated by examples,…

K-Theory and Homology · Mathematics 2019-05-23 Aslak Bakke Buan , Henning Krause , Nicole Snashall , Oeyvind Solberg

We prove an arithmetic regularity lemma for stable subsets of finite abelian groups, generalising our previous result for high-dimensional vector spaces over finite fields of prime order. A qualitative version of this generalisation was…

Logic · Mathematics 2018-05-18 C. Terry , J. Wolf

Given a triangulated category $\mathcal{C}$, we construct a partial compactification, denoted $\mathcal{A}\mathrm{Stab}(\mathcal{C})$, of the quotient of its stability manifold by $\mathbb{C}$. The purpose of…

Algebraic Geometry · Mathematics 2025-01-03 Daniel Halpern-Leistner , Antonios-Alexandros Robotis

In this short note, we establish some identities containing sums of binomials with coefficients satisfying third order linear recursive relations. As a result and in particular, we obtain general forms of earlier identities involving…

Combinatorics · Mathematics 2010-07-19 Emrah Kilic , Eugen J. Ionascu

By Auslander's algebraic McKay correspondence, the stable category of Cohen-Macaulay modules over a simple singularity is equivalent to the $1$-cluster category of the path algebra of a Dynkin quiver (i.e. the orbit category of the derived…

Representation Theory · Mathematics 2015-01-07 Claire Amiot , Osamu Iyama , Idun Reiten

We prove a formula which compares intersection numbers of conormal varieties of two projective varieties and their dual varieties. When one of them is linear, we can recover the usual Plucker formula for the degree of the dual variety. The…

Algebraic Geometry · Mathematics 2007-05-23 Naichung Conan Leung

We develop a general theory of local stability up to belonging to an ideal (e.g. having measure zero). From a model-theoretic perspective, we prove a stationarity principle for almost stable formulas in this sense, and build a topological…

Logic · Mathematics 2025-08-04 Marcos Girón

In this article we prove that all the inclusions between the 'classical' and naturally defined full triangulated subcategories of a weakly approximable triangulated category are intrinsic (in one case under a technical condition). This…

Algebraic Geometry · Mathematics 2024-02-08 Alberto Canonaco , Christian Haesemeyer , Amnon Neeman , Paolo Stellari

We introduce a general method to induce Bridgeland stability conditions on semiorthogonal components of triangulated categories. In particular, we prove the existence of Bridgeland stability conditions on the Kuznetsov component of the…

Algebraic Geometry · Mathematics 2023-06-14 Arend Bayer , Martí Lahoz , Emanuele Macrì , Paolo Stellari

We study complexes of stable $\infty$-categories, referred to as categorical complexes. As we demonstrate, examples of such complexes arise in a variety of subjects including representation theory, algebraic geometry, symplectic geometry,…

Algebraic Geometry · Mathematics 2024-02-16 Merlin Christ , Tobias Dyckerhoff , Tashi Walde

Let $\X$ be a resolving subcategory of an abelian category. In this paper we investigate the singularity category $\ds(\underline\X)=\db(\mod\underline\X)/\kb(\proj(\mod\underline\X))$ of the stable category $\underline\X$ of $\X$. We…

Commutative Algebra · Mathematics 2016-05-30 Hiroki Matsui , Ryo Takahashi

We define the concept of a regular object with respect to another object in an arbitrary category. We present basic properties of regular objects and we study this concept in the special cases of abelian categories and locally finitely…

Category Theory · Mathematics 2007-05-23 S. S. Dăscălescu , C. Năstăsescu , A. Tudorache , L. Dăuş

Linearly distributive categories were introduced to model the tensor/par fragment of linear logic, without resorting to the use of negation. Linear bicategories are the bicategorical version of linearly distributive categories. Essentially,…

Category Theory · Mathematics 2026-01-30 Richard Blute , Rose Kudzman-Blais , Susan Niefield