English
Related papers

Related papers: Rational torus-equivariant homotopy I: calculating…

200 papers

In previous work it is shown that there is an abelian category A(G) constructed to model rational G-equivariant cohomology theories, where G is a torus of rank r together with a homology functor \piA_* : Gspectra ---> A(G), and an Adams…

Algebraic Topology · Mathematics 2011-08-25 J. P. C. Greenlees

We provide a calculational method for rational stable equivariant homotopy theory for a torus G based on the homology of the Borel construction on fixed points. More precisely we define an abelian torsion model, A_t(G) of finite injective…

Algebraic Topology · Mathematics 2022-11-15 J. P. C. Greenlees

For G a compact Lie group, toral G-spectra are those rational G-spectra whose geometric isotropy consists of subgroups of a maximal torus of G. The homotopy category of rational toral G-spectra is a retract of the category of all rational…

Algebraic Topology · Mathematics 2019-12-25 David Barnes , J. P. C. Greenlees , Magdalena Kedziorek

We give details of models for rational torus equivariant homotopy theory based on (a) all subgroups, connected subgroups or dimensions of subgroups and (b) on pairs or general flags. We provide comparison functors and show the models are…

Algebraic Topology · Mathematics 2016-04-19 J. P. C. Greenlees

For an arbitrary compact Lie group G, we describe a model for rational G-spectra with toral geometric isotropy and show that there is a convergent Adams spectral sequence based on it. The contribution from geometric isotropy at a subgroup K…

Algebraic Topology · Mathematics 2016-09-21 J. P. C. Greenlees

We show that the category of rational G-spectra for a torus G is Quillen equivalent to an explicit small and practical algebraic model, thereby providing a universal de Rham model for rational G-equivariant cohomology theories. The result…

Algebraic Topology · Mathematics 2018-07-04 J. P. C. Greenlees , B. Shipley

We show that for any clopen collection X of subgroups of G with finite Weyl groups, the category of G-spectra with geometric isotropy in X is equivalent to the category of equivariant sheaves over X. This gives an algebraic model of…

Algebraic Topology · Mathematics 2025-08-12 J. P. C. Greenlees

For G an arbitrary profinite group, we construct an algebraic model for rational G-spectra in terms of G-equivariant sheaves over the space of subgroups of G. This generalises the known case of finite groups to a much wider class of…

Algebraic Topology · Mathematics 2024-12-18 David Barnes , Danny Sugrue

We give a natural construction and a direct proof of the Adams isomorphism for equivariant orthogonal spectra. More precisely, for any finite group G, any normal subgroup N of G, and any orthogonal G-spectrum X, we construct a natural map A…

Algebraic Topology · Mathematics 2016-07-05 Holger Reich , Marco Varisco

We classify thick tensor ideals of finite objects in the category of rational torus-equivariant spectra, showing that they are completely determined by geometric isotropy. This is essentially equivalent to showing that the Balmer spectrum…

Algebraic Topology · Mathematics 2016-12-07 J. P. C. Greenlees

Greenlees established an equivalence of categories between the homotopy category of rational SO(3)-spectra and the derived category DA(SO(3)) of a certain abelian category. In this paper we lift this equivalence of homotopy categories to…

Algebraic Topology · Mathematics 2018-03-16 Magdalena Kedziorek

The project of Greenlees et al. on understanding rational G-spectra in terms of algebraic categories has had many successes, classifying rational G-spectra for finite groups, SO(2), O(2), SO(3), free and cofree G-spectra as well as rational…

Algebraic Topology · Mathematics 2021-02-03 David Barnes , Magdalena Kedziorek

We describe a deformation of the $\infty$-category of Borel $G$-spectra for a finite group $G$. This provides a new presentation of the $a$-complete real Artin--Tate motivic stable homotopy category when $G=C_2$ and gives a new…

Algebraic Topology · Mathematics 2025-11-18 Gabriel Angelini-Knoll , Mark Behrens , Eva Belmont , Hana Jia Kong

We show that the category of symmetric spectra can be used as a model for global equivariant homotopy theory of finite groups.

Algebraic Topology · Mathematics 2019-05-29 Markus Hausmann

This monograph introduces a framework for genuine proper equivariant stable homotopy theory for Lie groups. The adjective `proper' alludes to the feature that equivalences are tested on compact subgroups, and that the objects are built from…

Algebraic Topology · Mathematics 2023-08-15 Dieter Degrijse , Markus Hausmann , Wolfgang Lück , Irakli Patchkoria , Stefan Schwede

In this paper we give algebraic models for rational G-spectra for a compact Lie group G when the geometric isotropy is restricted to lie in a 1-dimensional block of conjugacy classes. This includes all blocks of all groups of dimension 1,…

Algebraic Topology · Mathematics 2025-01-22 J. P. C. Greenlees

The category of rational G-equivariant cohomology theories for a compact Lie group $G$ is the homotopy category of rational G-spectra and therefore tensor-triangulated. We show that its Balmer spectrum is the set of conjugacy classes of…

Algebraic Topology · Mathematics 2017-06-27 J. P. C. Greenlees

Greenlees has conjectured that the rational stable equivariant homotopy category of a compact Lie group always has an algebraic model. Based on this idea, we show that the category of rational local systems on a connected finite loop space…

Algebraic Topology · Mathematics 2023-06-22 Drew Heard

The category of rational O(2)-equivariant cohomology theories has an algebraic model A(O(2)), as established by work of Greenlees. That is, there is an equivalence of categories between the homotopy category of rational O(2)-equivariant…

Algebraic Topology · Mathematics 2016-08-02 David Barnes

We prove a topological reconstruction result for the category of cellular $A$-equivariant motivic spectra over the complex numbers where $A$ is a finite abelian group: after completion at an arbitrary prime, this is equivalent to the…

Algebraic Topology · Mathematics 2025-10-24 Keita Allen , Lucas Piessevaux
‹ Prev 1 2 3 10 Next ›