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#### Local duality in algebra and topology

##### MPS-Authors
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Barthel,  Tobias
Max Planck Institute for Mathematics, Max Planck Society;

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Heard,  Drew
Max Planck Institute for Mathematics, Max Planck Society;

/persons/resource/persons236382

Valenzuela,  Gabriel
Max Planck Institute for Mathematics, Max Planck Society;

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arXiv:1511.03526.pdf
(Preprint), 924KB

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##### Citation

Barthel, T., Heard, D., & Valenzuela, G. (2018). Local duality in algebra and topology. Advances in mathematics, 335, 563-663. doi:10.1016/j.aim.2018.07.017.

Cite as: https://hdl.handle.net/21.11116/0000-0003-D06F-6
##### 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 $\mathcal{C}$ together with a collection of compact objects $\mathcal{K} \subset \mathcal{C}$ 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 A and a suitable ideal in A, 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 X implies the local duality theorem of Alonso Tarrío, Jeremías López, 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.