On the group of separable quadratic algebras and stacks
Algebraic Geometry
2019-02-20 v2 Commutative Algebra
Abstract
The aim of this paper is to study the group of isomorphism classes of torsors of finite flat group schemes of rank 2 over a commutative ring . This, in particular, generalises the group of quadratic algebras (free or projective), which is especially well studied. Our approach however, yields new results even in this case.
Keywords
Cite
@article{arxiv.1604.02547,
title = {On the group of separable quadratic algebras and stacks},
author = {Ilia Pirashvili},
journal= {arXiv preprint arXiv:1604.02547},
year = {2019}
}