Higher Galois theory
Category Theory
2017-07-11 v4 Algebraic Topology
Abstract
We generalize toposic Galois theory to higher topoi. We show that locally constant sheaves in a locally (n-1)-connected n-topos are equivalent to representations of its fundamental pro-n-groupoid, and that the latter can be described in terms of Galois torsors. We also show that finite locally constant sheaves in an arbitrary infinity-topos are equivalent to finite representations of its fundamental pro-infinity-groupoid. Finally, we relate the fundamental pro-infinity-groupoid of 1-topoi to the construction of Artin and Mazur and, in the case of the \'etale topos of a scheme, to its refinement by Friedlander.
Cite
@article{arxiv.1506.07155,
title = {Higher Galois theory},
author = {Marc Hoyois},
journal= {arXiv preprint arXiv:1506.07155},
year = {2017}
}
Comments
Final version, to appear in JPAA