Sekiguchi-Suwa theory revisited
Number Theory
2011-04-13 v1 Algebraic Geometry
Abstract
We present an account of the construction by S. Sekiguchi and N. Suwa of a cyclic isogeny of affine smooth group schemes unifying the Kummer and Artin-Schreier-Witt isogenies. We complete the construction over an arbitrary base ring. We extend the statements of some results in a form adapted to a further investigation of the models of the group schemes of roots of unity.
Cite
@article{arxiv.1104.2222,
title = {Sekiguchi-Suwa theory revisited},
author = {Ariane Mézard and Matthieu Romagny and Dajano Tossici},
journal= {arXiv preprint arXiv:1104.2222},
year = {2011}
}
Comments
29 pages