Date
2019/05/10 Fri 10:30 - 12:00
Room
3号館152号室
Speaker
Kentaro Mitsui
Affiliation
Kobe University
Abstract
For a given quasi-projective flat group scheme G over a normal integral scheme with generic fiber Gη, we study models of \'etale torsors under Gη with action of G, especially, their classification and quasi-sections. In the case where G is the N\'eron model of an elliptic curve Gη over an integral Dedekind scheme, we show that the action of Gη on a torsor Xη uniquely extends to an action of G on the minimal regular model of Xη.