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Given a suitable Noetherian scheme, we classify tensor $t$-structures on the bounded derived category of coherent sheaves and its variants with prescribed support. Furthermore, we show that the existence of such $t$-structures restricting…

Algebraic Geometry · Mathematics 2026-05-19 Alexander Clark , Pat Lank , Kabeer Manali-Rahul , Chris J. Parker

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

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 commutative Noetherian ring $R$ with finite Krull dimension, we study the nullity classes in $D^c_{fg}(R)$, the full triangulated subcategory $D^c_{fg}(R)$ of the derived category $D(R)$ consisting of objects which can be represented…

Category Theory · Mathematics 2016-11-01 Yong Liu , Donald Stanley

We classify bounded t-structures on the category of perfect complexes over a commutative, Noetherian ring of finite Krull dimension, extending a result of Alonso Tarrio, Jeremias Lopez and Saorin which covers the regular case. In…

Algebraic Topology · Mathematics 2019-10-18 Harry Smith

We formulate a notion of "geometric reductivity" in an abstract categorical setting which we refer to as adequacy. The main theorem states that the adequacy condition implies that the ring of invariants is finitely generated. This result…

Algebraic Geometry · Mathematics 2010-11-10 Jarod Alper , A. J. de Jong

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

We classify all compactly generated t-structures in the unbounded derived category of an arbitrary commutative ring, generalizing the result of [ATLJS10] for noetherian rings. More specifically, we establish a bijective correspondence…

Commutative Algebra · Mathematics 2018-08-08 Michal Hrbek

We classify complactly generated t-structures on the derived category of modules over a commutative Noetherian ring R in terms of decreasing filtrations by supports on Spec(R). A decreasing filtration by supports \phi : Z -> Spec(R)…

Algebraic Geometry · Mathematics 2017-04-27 Leovigildo Alonso , Ana Jeremias , Manuel Saorin

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 classify compactly generated co-t-structures on the derived category of a commutative noetherian ring. In order to accomplish that, we develop a theory for compactly generated Hom-orthogonal pairs (also known as torsion pairs in the…

Category Theory · Mathematics 2016-02-24 Jan Stovicek , David Pospisil

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 investigate parametrizations of compactly generated t-structures, or more generally, t-structures with a definable coaisle, in the unbounded derived category D(Mod-A) of a ring A. To this end, we provide a construction of t-structures…

Representation Theory · Mathematics 2021-06-22 Lidia Angeleri Hügel , Michal Hrbek

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

In the paper "Deformation theory of abelian categories", the last two authors proved that an abelian category with enough injectives can be reconstructed as the category of finitely presented modules over the category of its injective…

Category Theory · Mathematics 2022-01-20 Francesco Genovese , Wendy Lowen , Michel Van den Bergh

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

Let $RQ$ be the path algebra of a Dynkin quiver $Q$ over a commutative noetherian ring $R$. We show that any homotopically smashing t-structure in the derived category of $RQ$ is compactly generated. We also give a complete description of…

Representation Theory · Mathematics 2025-05-28 Enrico Sabatini

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

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

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
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