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Recently, Amnon Neeman settled a bold conjecture by Antieau, Gepner, and Heller regarding the relationship between the regularity of finite-dimensional noetherian schemes and the existence of bounded $t$-structures on their derived…

Rings and Algebras · Mathematics 2024-07-26 Rudradip Biswas , Hongxing Chen , Kabeer Manali Rahul , Chris J. Parker , Junhua Zheng

We construct an invariant of t-structures on the derived category of a Noetherian ring. This invariant is complete when restricting to the category of quasi-coherent complexes, and also gives a classification of nullity classes with the…

Commutative Algebra · Mathematics 2007-05-23 Don Stanley

This work studies $t$-structures for the derived category of quasi-coherent sheaves on a quasi-compact quasi-separated algebraic stack. Specifically, using Thomason filtrations, we classify those $t$-structures which are generated by…

Algebraic Geometry · Mathematics 2025-07-04 Pat Lank

The category of coherent sheaves over a noetherian scheme is very important for studying the properties of a given scheme. For noetherian schemes it is a well-known fact that the topology can be fully recovered from the corresponding…

Algebraic Geometry · Mathematics 2025-07-08 Ron Held

We introduce a tensor compatibility condition for t-structures. For any Noetherian scheme $X$, we prove that there is a one-to-one correspondence between the set of filtrations of Thomason subsets and the set of aisles of compactly…

Algebraic Geometry · Mathematics 2023-10-10 Gopinath Sahoo , Umesh V. Dubey

We generalize the construction given in math.AG/0309435 of a "constant" t-structure on the bounded derived category of coherent sheaves $D(X\times S)$ starting with a t-structure on $D(X)$. Namely, we remove smoothness and quasiprojectivity…

Algebraic Geometry · Mathematics 2007-05-23 Alexander Polishchuk

Let $X$ be a finite-dimensional, noetherian scheme. Antieau, Gepner and Heller conjectured that its derived category of perfect complexes has a bounded t-structure if and only if $X$ is regular. We prove a generalization, and to do so we…

Algebraic Geometry · Mathematics 2024-12-23 Amnon Neeman

We introduce the notion of tensor t-structures on the bounded derived categories of schemes. For a Noetherian scheme $X$ admitting a dualizing complex, Bezrukavnikov-Deligne, and then independently Gabber and Kashiwara have shown that given…

Algebraic Geometry · Mathematics 2024-12-25 Gopinath Sahoo

We introduce a notion of proxy smallness for $t$-structures on triangulated categories associated to a Noetherian scheme. Specifically, the theory is developed in the presence of tensor actions. Consequently, our results yield a new…

Algebraic Geometry · Mathematics 2026-05-27 Michal Hrbek , Pat Lank , Giovanna Le Gros , Sergio Pavon

In this work more questions arise than answers given, for which of course we do not apologize. The core of this paper is concerned with the construction of a ``constant'' t-structure on the bounded derived category of coherent sheaves…

Algebraic Geometry · Mathematics 2007-05-23 Dan Abramovich , Alexander Polishchuk

We give a self-dual t-structure on the derived category of $\mathbb{R}$-constructible sheaves over a Noetherian regular ring by generalizing the notion of t-structure.

Category Theory · Mathematics 2015-12-22 Masaki Kashiwara

For a noetherian scheme, we introduce its unbounded stable derived category. This leads to a recollement which reflects the passage from the bounded derived category of coherent sheaves to the quotient modulo the subcategory of perfect…

Algebraic Geometry · Mathematics 2007-05-23 Henning Krause

We give a condition which characterises those weight structures on a derived category which come from a Thomason filtration on the underlying scheme. Weight structures satisfying our condition will be called $\otimes ^c$-weight structures.…

Algebraic Geometry · Mathematics 2022-11-07 Umesh V Dubey , Gopinath Sahoo

In this paper, we classify several subcategories of the category of coherent sheaves on a noetherian divisorial scheme (e.g. a quasi-projective scheme over a commutative noetherian ring). More precisely, we classify the torsionfree (resp.…

Representation Theory · Mathematics 2023-04-21 Shunya Saito

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

We study aisles in the derived category of a hereditary abelian category. Given an aisle, we associate a sequence of subcategories of the abelian category by considering the different homologies of the aisle. We then obtain a sequence,…

Category Theory · Mathematics 2012-02-23 Donald Stanley , Adam-Christiaan van Roosmalen

We associate a t-structure to a family of objects in D(A), the derived category of a Grothendieck category A. Using general results on t-structures, we give a new proof of Rickard's theorem on equivalence of bounded derived categories of…

Representation Theory · Mathematics 2007-05-23 Leovigildo Alonso , Ana Jeremias , Ma. -Jose Souto

For a Noetherian scheme $X$ of finite Krull dimension, Neeman recently established two characterizations of the regularity of $X$ using strong generators and bounded $t$-structures on $\operatorname{Perf}(X)$. In this note, we obtain…

Algebraic Geometry · Mathematics 2026-04-21 Timothy De Deyn , Pat Lank , Kabeer Manali Rahul , Fei Peng

This work studies conditions under which integral transforms induce exact functors on singularity categories between schemes that are proper over a Noetherian base scheme. A complete characterization for this behavior is provided, which…

Algebraic Geometry · Mathematics 2025-09-16 Uttaran Dutta , Pat Lank , Kabeer Manali Rahul

We prove basic facts about reflexivity in derived categories over noetherian schemes; and about related notions such as semidualizing complexes, invertible complexes, and Gorenstein-perfect maps. Also, we study a notion of rigidity with…

Algebraic Geometry · Mathematics 2010-01-21 Luchezar L. Avramov , Srikanth B. Iyengar , Joseph Lipman
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