Logarithmic good reduction of abelian varieties
Algebraic Geometry
2016-10-25 v2 Number Theory
Abstract
Let be a field which is complete for a discrete valuation. We prove a logarithmic version of the N\'eron-Ogg-Shafarevich criterion: if is an abelian variety over which is cohomologically tame, then has good reduction in the logarithmic setting, i.e. there exists a projective, log smooth model of over . This implies in particular the existence of a projective, regular model of , generalizing a result of K\"unnemann. The proof combines a deep theorem of Gabber with the theory of degenerations of abelian varieties developed by Mumford, Faltings-Chai et al.
Cite
@article{arxiv.1512.02464,
title = {Logarithmic good reduction of abelian varieties},
author = {Alberto Bellardini and Arne Smeets},
journal= {arXiv preprint arXiv:1512.02464},
year = {2016}
}
Comments
final version, to appear in Mathematische Annalen