English

Categorical K\"unneth formulas for analytic stacks

Algebraic Geometry 2025-07-14 v1 Number Theory

Abstract

In arXiv:0805.0157v5, the authors define a class of derived stacks, called "perfect stacks" and show that for this class the categories of quasi-coherent sheaves satisfy a categorical K\"unneth formula. Motivated to extend their results to the theory of analytic stacks as developed by Clausen-Scholze, we investigate categorical K\"unneth formulas for general 66-functor formalisms. As applications we show a general Tannakian reconstruction result for analytic stacks and, following recent work of Ansch\"utz, Le Bras and Mann arXiv:2412.20968v1, show a pp-adic version of Drinfeld's lemma for certain stacks that appear conjecturally in a categorical pp-adic Langlands program.

Keywords

Cite

@article{arxiv.2507.08566,
  title  = {Categorical K\"unneth formulas for analytic stacks},
  author = {Youshua Kesting},
  journal= {arXiv preprint arXiv:2507.08566},
  year   = {2025}
}

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R2 v1 2026-07-01T03:56:33.778Z