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This note is concerned with the Rouquier dimension of the bounded derived category of coherent complexes on a Noetherian algebraic stack. Specifically, we study the diagonal dimension of a morphism, which can be used to produce upper bounds…

Algebraic Geometry · Mathematics 2026-05-14 Pat Lank , Fei Peng

This work explores bounds on the Rouquier dimension in the bounded derived category of coherent sheaves on Noetherian schemes. By utilizing approximations, we exhibit that Rouquier dimension is inherently characterized by the number of…

Algebraic Geometry · Mathematics 2025-01-20 Pat Lank , Noah Olander

We show that the Rouquier dimension of the category of perfect complexes over a regular ring is precisely the Krull dimension of the ring. Previously, it was known that the Krull dimension is an upper bound, the lower bound however was not…

Commutative Algebra · Mathematics 2025-07-01 Janina C. Letz

In this paper we prove that the dimension of the bounded derived category of coherent sheaves on a smooth quasi-projective curve is equal to one. We also discuss dimension spectrums of these categories.

Algebraic Geometry · Mathematics 2011-03-15 Dmitri Orlov

We study the algebraic structure of the automorphism group of the derived category of coherent sheaves on a smooth projective variety twisted by a Brauer class. Our main results generalize results of Rouquier in the untwisted case.

Algebraic Geometry · Mathematics 2025-01-13 Martin Olsson

We prove a theorem relating torus-equivariant coherent sheaves on toric varieties to polyhedrally-constructible sheaves on a vector space. At the level of K-theory, the theorem recovers Morelli's description of the K-theory of a smooth…

Algebraic Geometry · Mathematics 2011-09-23 Bohan Fang , Chiu-Chu Melissa Liu , David Treumann , Eric Zaslow

This work demonstrates classical generation is preserved by the derived pushforward along the structure morphism of a noncommutative coherent algebra to its underlying scheme. Additionally, we establish that the Krull dimension of a variety…

Algebraic Geometry · Mathematics 2025-03-26 Anirban Bhaduri , Souvik Dey , Pat Lank

We establish some properties of the derived category of torus-equivariant coherent sheaves on a split toric stack bundle. Our main result is a semi-orthogonal decomposition of such a category.

Algebraic Geometry · Mathematics 2025-01-24 Qian Chao , Jiun-Cheng Chen , Hsian-Hua Tseng

We give an example of a commutative coherent ring of infinite global dimension such that the category of perfect complexes has finite Rouquier dimension.

Algebraic Geometry · Mathematics 2024-10-08 Greg Stevenson

We prove that the bounded derived category of coherent sheaves with proper support is equivalent to the category of locally-finite, cohomological functors on the perfect derived category of a quasi-projective scheme over a field. We…

Algebraic Geometry · Mathematics 2011-05-18 Matthew Robert Ballard

We give a new upper bound for the generation time of a tilting object and use it to verify, in some new cases, a conjecture of Orlov on the Rouquier dimension of the derived category of coherent sheaves on a smooth variety.

Algebraic Geometry · Mathematics 2013-10-15 Matthew Ballard , David Favero

The coherent-constructible correspondence is a relationship between coherent sheaves on a toric variety X, and constructible sheaves on a real torus T. This was discovered by Bondal, and explored in the equivariant setting by Fang, Liu,…

Algebraic Geometry · Mathematics 2014-03-07 Sarah Scherotzke , Nicolò Sibilla

In this paper, we investigate properties of the bounded derived category of finite dimensional modules over a gentle or skew-gentle algebra. We show that the Rouquier dimension of the derived category of such an algebra is at most one.…

Representation Theory · Mathematics 2017-06-27 Igor Burban , Yuriy Drozd

Given any toric subvariety $Y$ of a smooth toric variety $X$ of codimension $k$, we construct a length $k$ resolution of $\mathcal O_Y$ by line bundles on $X$. Furthermore, these line bundles can all be chosen to be direct summands of the…

Algebraic Geometry · Mathematics 2024-12-04 Andrew Hanlon , Jeff Hicks , Oleg Lazarev

A criterion for a functor between derived categories of coherent sheaves to be full and faithful is given. A semiorthogonal decomposition for the derived category of coherent sheaves on the intersection of two even dimensional quadrics is…

alg-geom · Mathematics 2008-02-03 A. Bondal , D. Orlov

A morphism from a diagonalizable group $G$ to the torus of a toric variety $X$ induces an action of $G$ on $X$. We prove the category of ind-coherent sheaves on the quotient stack is equivalent to the category of sheaves on a cover of a…

Symplectic Geometry · Mathematics 2025-06-24 Yuze Sun

Several years ago, Bondal, Rouquier and Van den Bergh introduced the notion of the dimension of a triangulated category, and Rouquier proved that the bounded derived category of coherent sheaves on a separated scheme of finite type over a…

Commutative Algebra · Mathematics 2011-10-31 Takuma Aihara , Ryo Takahashi

We prove that the bounded derived category of coherent sheaves on a smooth projective complex variety reconstructs the isomorphism classes of fibrations onto smooth projective curves of genus $g\geq 2$. Moreover, in dimension at most four,…

Algebraic Geometry · Mathematics 2023-09-14 Luigi Lombardi

This paper introduces the concept of the dimension of a triangulated category with respect to a fixed full subcategory. For the bounded derived category of an abelian category, upper bounds of the dimension with respect to a contravariantly…

Representation Theory · Mathematics 2013-10-01 Takuma Aihara , Tokuji Araya , Osamu Iyama , Ryo Takahashi , Michio Yoshiwaki

In this paper we prove a duality for constructible sheaves on conically smooth stratified spaces. Here we consider sheaves with values in a stable and bicomplete $\infty$-category equipped with a closed symmetric monoidal structure, and in…

Algebraic Topology · Mathematics 2023-12-04 Marco Volpe
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