English

Local duality in algebra and topology

Algebraic Topology 2019-01-23 v3 Commutative Algebra Algebraic Geometry Category Theory

Abstract

The first goal of this paper is to provide an abstract framework in which to formulate and study local duality in various algebraic and topological contexts. For any stable \infty-category C\mathcal{C} together with a collection of compact objects KC\mathcal{K} \subset \mathcal{C} we construct local cohomology and local homology functors satisfying an abstract version of local duality. When specialized to the derived category of a commutative ring AA and a suitable ideal in AA, we recover the classical local duality due to Grothendieck as well as generalizations by Greenlees and May. More generally, applying our result to the derived category of quasi-coherent sheaves on a quasi-compact and separated scheme XX implies the local duality theorem of Alonso Tarr\'io, Jerem\'ias L\'opez, and Lipman. As a second objective, we establish local duality for quasi-coherent sheaves over many algebraic stacks, in particular those arising naturally in stable homotopy theory. After constructing an appropriate model of the derived category in terms of comodules over a Hopf algebroid, we show that, in familiar cases, the resulting local cohomology and local homology theories coincide with functors previously studied by Hovey and Strickland. Furthermore, our framework applies to global and local stable homotopy theory, in a way which is compatible with the algebraic avatars of these theories. In order to aid computability, we provide spectral sequences relating the algebraic and topological local duality contexts.

Keywords

Cite

@article{arxiv.1511.03526,
  title  = {Local duality in algebra and topology},
  author = {Tobias Barthel and Drew Heard and Gabriel Valenzuela},
  journal= {arXiv preprint arXiv:1511.03526},
  year   = {2019}
}

Comments

Significantly revised version to appear in Advances in Mathematics. Section 6 has been removed, and an expanded version will appear in a separate paper

R2 v1 2026-06-22T11:42:37.391Z