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We investigate group actions on the category of coherent sheaves over weighted projective lines. We show that the equivariant category with respect to certain finite group action is equivalent to the category of coherent sheaves over a…

Representation Theory · Mathematics 2021-04-20 Qiang Dong , Shiquan Ruan , Hongxia Zhang

The derived category of bounded complexes of coherent sheaves is one of the most important algebraic invariants of a smooth projective variety. An important approach to understand derived categories is to construct full strongly exceptional…

Algebraic Geometry · Mathematics 2010-10-19 L. Costa , S. Di Rocco , R. M. Miro-Roig

A semiorthogonal decomposition for the bounded derived category (the category of perfect complexes in a non smooth case) of coherent sheaves on a Brauer Severi scheme is given. It relies on bounded derived categories (categories of perfect…

Algebraic Geometry · Mathematics 2007-05-23 Marcello Bernardara

For flat proper families of algebraic varieties with a smooth fiber, we describe the abelian category of coherent sheaves on the generic fiber as a Serre quotient. As an application, we prove specialization of derived equivalence. As…

Algebraic Geometry · Mathematics 2024-12-30 Hayato Morimura

We discuss derived categories of coherent sheaves on algebraic varieties. We focus on the case of non-singular Calabi-Yau varieties and consider two unsolved problems: proving that birational varieties have equivalent derived categories,…

Algebraic Geometry · Mathematics 2019-12-20 Tom Bridgeland

We study the group of autoequivalences of the derived categories of coherent sheaves on smooth projective elliptic surfaces with non-zero Kodaira dimensions. We find a description of it when each reducible fiber is a cycle of $(-2)$-curves.

Algebraic Geometry · Mathematics 2015-11-20 Hokuto Uehara

In this note, we will illuminate some immediate consequences of work done by Reineke that may prove to be useful in the study of elliptic curves. In particular, we will construct an isomorphism between the category of smooth projective…

Algebraic Geometry · Mathematics 2023-06-22 Ray Maresca

Let T be a compact complex torus, dim T>2. We show that the category of coherent sheaves on T is independent of the choice of the complex structure, if this complex structure is generic. The proof is independent of math.AG/0205210, where…

Algebraic Geometry · Mathematics 2007-05-23 Misha Verbitsky

We classify thick subcategories of the $\infty$-categories of perfect modules over ring spectra which arise as functions on even periodic derived stacks satisfying affineness and regularity conditions. For example, we show that the thick…

Algebraic Topology · Mathematics 2015-08-12 Akhil Mathew

We survey some recent results concerning the so called Categorical Torelli problem. This is to say how one can reconstruct a smooth projective variety up to isomorphism, by using the homological properties of special admissible…

Algebraic Geometry · Mathematics 2022-08-31 Laura Pertusi , Paolo Stellari

We give a generalization of the theorem of Bondal and Orlov about the derived categories of coherent sheaves on intersections of quadrics revealing its relation to projective duality. As an application we describe the derived categories of…

Algebraic Geometry · Mathematics 2015-06-26 Alexander Kuznetsov

We classify the thick subcategories of discrete derived categories. To do this we introduce certain generating sets called arc-collections which correspond to configurations of non-crossing arcs on a geometric model. We show that every…

Representation Theory · Mathematics 2016-08-25 Nathan T Broomhead

We describe an isomorphism of categories conjectured by Kontsevich. If $M$ and $\widetilde{M}$ are mirror pairs then the conjectural equivalence is between the derived category of coherent sheaves on $M$ and a suitable version of Fukaya's…

Algebraic Geometry · Mathematics 2008-11-26 Alexander Polishchuk , Eric Zaslow

We study derived categories of coherent sheaves on abelian varieties. We give a criterion for the equivalence of the derived categories on two abelian varieties. We describe the autoequivalence group for the derived category of coherent…

alg-geom · Mathematics 2025-07-25 Dmitri Orlov

In this paper, we show all k-linear abelian 1-Calabi-Yau categories over an algebraically closed field k are derived equivalent to either the category of coherent sheaves on an elliptic curve, or to the finite dimensional representations of…

Category Theory · Mathematics 2008-02-26 Adam-Christiaan van Roosmalen

We extend Orlov's representability theorem on the equivalence of derived categories of sheaves to the case of smooth stacks associated to normal projective varieties with only quotient singularities.

Algebraic Geometry · Mathematics 2007-05-23 Yujiro Kawamata

Let M be a K3 surface or an even-dimensional compact torus. We show that the category of coherent sheaves on M is independent from the choice of the complex structure, if this complex structure is generic.

Algebraic Geometry · Mathematics 2008-10-12 Misha Verbitsky

We discuss the structure of the derived category of coherent sheaves on cubic fourfolds of three types: Pfaffian cubics, cubics containing a plane and singular cubics, and discuss its relation to the rationality of these cubics.

Algebraic Geometry · Mathematics 2018-09-11 Alexander Kuznetsov

Let $\mathbb{X}$ be a weighted noncommutative regular projective curve over a field $k$. The category $\operatorname{Qcoh}\mathbb{X}$ of quasicoherent sheaves is a hereditary, locally noetherian Grothendieck category. We classify all…

Algebraic Geometry · Mathematics 2017-02-09 Lidia Angeleri Hügel , Dirk Kussin

Inside the symmetric product of a very general curve, we consider the codimension-one subvarieties of symmetric tuples of points imposing exceptional secant conditions on linear series on the curve of fixed degree and dimension. We compute…

Algebraic Geometry · Mathematics 2016-02-03 Nicola Tarasca