English

The \'etale topos reconstructs varieties over sub-p-adic fields

Algebraic Geometry 2024-10-31 v1 Number Theory

Abstract

Let KK be a sub-pp-adic field. We show that the functor sending a finite type KK-scheme to its \'etale topos is fully faithful after localizing at the class of universal homeomorphisms. This generalizes a result of Voevodsky, who proved the analogous theorem for fields finitely generated over Q\mathbb{Q}. Our proof relies on Mochizuki's Hom-theorem in anabelian geometry, and a study of point-theoretic morphisms of fundamental groups of curves.

Keywords

Cite

@article{arxiv.2410.22474,
  title  = {The \'etale topos reconstructs varieties over sub-p-adic fields},
  author = {Magnus Carlson and Jakob Stix},
  journal= {arXiv preprint arXiv:2410.22474},
  year   = {2024}
}

Comments

12 pages, comments welcome

R2 v1 2026-06-28T19:40:19.367Z