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We extend the scope of Balmer's tensor triangular Chow groups to compactly generated triangulated categories $\mathcal{K}$ that only admit an action by a compactly-rigidly generated tensor triangulated category $\mathcal{T}$ as opposed to…

Category Theory · Mathematics 2015-10-02 Sebastian Klein

We classify the localising tensor ideal and colocalising hom-closed subcategories of the stable module category for $\mathrm{LH}\mathfrak{F}$ groups. Along the way we develop techniques to provide similar classifications for other…

Representation Theory · Mathematics 2024-11-01 Gregory Kendall

We compute the the Balmer spectra of compact objects of tensor triangulated categories whose objects are filtered or graded objects of (or sheaves valued in) another tensor triangulated category. Notable examples include the filtered…

Algebraic Topology · Mathematics 2023-04-13 Ko Aoki

This paper is a sequel to "Localization of $\frak{u}$-modules. I", hep-th/9411050. We are starting here the geometric study of the tensor category $\cal{C}$ associated with a quantum group (corresponding to a Cartan matrix of finite type)…

q-alg · Mathematics 2008-02-03 M. Finkelberg , V. Schechtman

This paper lays some of the foundations for working with not-necessarily-commutative bialgebras and their categories of comodules in $\infty$-categories. We prove that the categories of comodules and modules over a bialgebra always admit…

Algebraic Topology · Mathematics 2021-08-20 Jonathan Beardsley

Using Balmer--Favi's generalized idempotents, we establish the telescope conjecture for many algebraic stacks. Along the way, we classify the thick tensor ideals of perfect complexes of stacks.

Algebraic Geometry · Mathematics 2017-07-12 Jack Hall , David Rydh

In the setting of the unbounded derived category D(R) of a ring R of weak global dimension at most one we consider t-structures with a definable coaisle. The t-structures among these which are stable (that is, the t-structures which consist…

Commutative Algebra · Mathematics 2020-08-03 Silvana Bazzoni , Michal Hrbek

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

The authors develop a notion of homological prime spectrum for an arbitrary monoidal triangulated category, ${\mathbf C}$. Unlike the symmetric case due to Balmer, the homological primes of ${\mathbf C}$ are not defined as the maximal Serre…

Category Theory · Mathematics 2025-06-26 Daniel K. Nakano , Kent B. Vashaw , Milen T. Yakimov

For any compactly generated triangulated category we introduce two topological spaces, the shift-spectrum and the shift-homological spectrum. We use them to parametrise a family of thick subcategories of the compact objects, which we call…

Category Theory · Mathematics 2026-01-07 Isaac Bird , Jordan Williamson , Alexandra Zvonareva

Let $R$ be a commutative noetherian ring. Denote by $D^-(R)$ the derived category of cochain complexes $X$ of finitely generated $R$-modules with $H^i(X)=0$ for $i\gg0$. Then $D^-(R)$ has the structure of a tensor triangulated category with…

Commutative Algebra · Mathematics 2018-03-16 Hiroki Matsui , Ryo Takahashi

We give sufficient conditions for effective descent in categories of (generalized) internal multicategories. Two approaches to study effective descent morphisms are pursued. The first one relies on establishing the category of internal…

Category Theory · Mathematics 2023-11-13 Rui Prezado , Fernando Lucatelli Nunes

We study the tensor-triangular geometry of the category of rational $G$-spectra for a compact Lie group $G$. In particular, we prove that this category can be naturally decomposed into local factors supported on individual subgroups, each…

Algebraic Topology · Mathematics 2023-12-01 Scott Balchin , Tobias Barthel , J. P. C. Greenlees

We survey some methods developed in a series of papers, for classifying localising subcategories of tensor triangulated categories. We illustrate these methods by proving a new theorem, providing such a classification in the case of the…

Representation Theory · Mathematics 2020-10-21 Dave Benson , Srikanth B. Iyengar , Henning Krause , Julia Pevtsova

By virtue of Balmer's celebrated theorem, the classification of thick tensor ideals of a tensor triangulated category $\T$ is equivalent to the topological structure of its Balmer spectrum $\spc \T$. Motivated by this theorem, we discuss…

Commutative Algebra · Mathematics 2017-05-15 Hiroki Matsui

The tensor ideal localising subcategories of the stable module category of all, including infinite dimensional, representations of a finite group scheme over a field of positive characteristic are classified. Various applications concerning…

Representation Theory · Mathematics 2017-07-07 Dave Benson , Srikanth B. Iyengar , Henning Krause , Julia Pevtsova

We classify localising subcategories of the stable module category of a finite group that are closed under tensor product with simple (or, equivalently all) modules. One application is a proof of the telescope conjecture in this context.…

Representation Theory · Mathematics 2011-04-18 Dave Benson , Srikanth B. Iyengar , Henning Krause

We introduce an algorithm to decide isomorphism between tensors. The algorithm uses the Lie algebra of derivations of a tensor to compress the space in which the search takes place to a so-called densor space. To make the method practicable…

Rings and Algebras · Mathematics 2022-08-19 Peter A. Brooksbank , Joshua Maglione , James B. Wilson

In several familiar subcategories of the category ${\mathbb T}$ of topological spaces and continuous maps, embeddings are not pushout-stable. But, an interesting feature, capturable in many categories, namely in categories $\mathcal{B}$ of…

Category Theory · Mathematics 2007-05-23 Lurdes Sousa

We derive several tools for classifying tensor ideals in monoidal categories. We use these results to classify tensor ideals in Deligne's universal categories RepO, RepGL and RepP. These results are then used to obtain new insight into the…

Category Theory · Mathematics 2018-11-15 Kevin Coulembier