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We present some results on equivariant KK-theory in the context of tensor triangular geometry. More specifically, for G a finite group, we show that the spectrum of the tensor triangulated subcategory of KK^G generated by the tensor unit…

K-Theory and Homology · Mathematics 2011-01-13 Ivo Dell'Ambrogio

Let $\mathfrak g$ be a complex simple Lie algebra and let $U_{\zeta}({\mathfrak g})$ be the corresponding Lusztig ${\mathbb Z}[q,q^{-1}]$-form of the quantized enveloping algebra specialized to an $\ell$th root of unity. Moreover, let…

Representation Theory · Mathematics 2019-04-09 Brian D. Boe , Jonathan R. Kujawa , Daniel K. Nakano

We prove that the Balmer spectrum of a tensor triangulated category is homeomorphic to the Zariski spectrum of its graded central ring, provided the triangulated category is generated by its tensor unit and the graded central ring is…

Category Theory · Mathematics 2016-10-05 Ivo Dell'Ambrogio , Donald Stanley

We compute the Balmer spectrum of a certain tensor triangulated category of comodules over the mod 2 dual Steenrod algebra. This computation effectively classifies the thick subcategories, resolving a conjecture of Palmieri.

Algebraic Topology · Mathematics 2024-09-18 Collin Litterell

We prove that, given the Balmer spectrum of any essentially small monoidal-triangulated category, one has a classification of semiprime thick tensor-ideals arising in terms of a "pseudo-Hochster-dual" of the noncommutative Balmer spectrum.…

Category Theory · Mathematics 2025-12-08 Timothy De Deyn , Sam K. Miller

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

In this paper, we study geometric points in tensor triangular geometry. In doing so, we construct a counter-example to Balmer's Nerves of Steel conjecture using free constructions in higher Zariski geometry. We then go on to introduce and…

Algebraic Topology · Mathematics 2026-03-27 Tobias Barthel , Logan Hyslop , Maxime Ramzi

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

We develop a general noncommutative version of Balmer's tensor triangular geometry that is applicable to arbitrary monoidal triangulated categories (M$\Delta$Cs). Insight from noncommutative ring theory is used to obtain a framework for…

Category Theory · Mathematics 2021-05-13 Daniel K. Nakano , Kent B. Vashaw , Milen T. Yakimov

These notes attempt to give a short survey of the approach to support theory and the study of lattices of triangulated subcategories through the machinery of tensor triangular geometry. One main aim is to introduce the material necessary to…

Category Theory · Mathematics 2016-01-15 Greg Stevenson

For a tensor triangulated category and any regular cardinal $\alpha$ we study the frame of $\alpha$-localizing tensor ideals and its associated space of points. For a well-generated category and its frame of localizing tensor ideals we…

Category Theory · Mathematics 2022-09-07 Henning Krause , Janina C. Letz

In this paper, we compute triangular spectrum (as defined by P. Balmer) of two classes of tensor triangulated categories which are quite common in algebraic geometry. One of them is the derived category of $G$-equivariant sheaves on a…

Algebraic Geometry · Mathematics 2011-05-03 Umesh V. Dubey , Vivek M. Mallick

We revisit the classical constructions of tensor-triangular geometry in the setting of stably symmetric monoidal idempotent-complete $\infty$-categories, henceforth referred to as 2-rings. In this setting, we produce a Zariski topology, a…

Algebraic Geometry · Mathematics 2025-08-18 Ko Aoki , Tobias Barthel , Anish Chedalavada , Tomer Schlank , Greg Stevenson

A "tensor space" is a vector space equipped with a finite collection of multi-linear forms. In previous work, we showed that (for each signature) there exists a universal homogeneous tensor space, which is unique up to isomorphism. Here we…

Representation Theory · Mathematics 2024-07-30 Nate Harman , Andrew Snowden

Tensor hierarchy algebras constitute a class of non-contragredient Lie superalgebras, whose finite-dimensional members are the "Cartan-type" Lie superalgebras in Kac's classification. They have applications in mathematical physics,…

High Energy Physics - Theory · Physics 2020-03-18 Martin Cederwall , Jakob Palmkvist

For an essentially small triangulated category $\mathcal{T}$, we introduce the notion of prime thick subcategories and define the spectrum of $\mathcal{T}$, which shares the basic properties with the spectrum of a tensor triangulated…

Algebraic Geometry · Mathematics 2021-10-13 Hiroki Matsui

We develop a point-free approach for constructing the Nakano-Vashaw-Yakimov-Balmer spectrum of a noncommutative tensor triangulated category under some mild assumptions. In particular, we provide a conceptual way of classifying radical…

Category Theory · Mathematics 2022-04-20 Vivek Mohan Mallick , Samarpita Ray

Let C be a finite EI category and k be a field. We consider the category algebra kC. Suppose K(C)=D^b(kC-mod) is the bounded derived category of finitely generated left modules. This is a tensor triangulated category and we compute its…

Representation Theory · Mathematics 2013-09-16 Fei Xu

This paper develops the algebraic foundation required to build a Zariski-type geometry for \emph{commutative ternary $\Gamma$-semirings}, where multiplication is an inherently triadic, multi-parametric interaction…

Rings and Algebras · Mathematics 2025-12-25 Chandrasekhar Gokavarapu , D. Madhusudhana Rao

We introduce a new topological invariant of a rigidly-compactly generated tensor-triangulated category and two new notions of support. The first is based on smashing subcategories: it is unknown whether the frame of smashing subcategories…

Category Theory · Mathematics 2023-09-01 Scott Balchin , Greg Stevenson
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