Back to Algebraic Geometry Seminar: Fall 2019
Algebraic Geometry Seminar
Date: Tuesday, Oct 1, 2019
Time: 3:30PM - 4:30PM
Location: LCB 222
Gebhard Martin
University of Bonn
Title |
Automorphisms of unnodal Enriques surfaces |
Abstract |
It follows from an observation of A. Coble in 1919 that the automorphism group of an unnodal Enriques surface contains the 2-congruence subgroup of the Weyl group of the E_{10}-lattice. In this talk, I will explain how much bigger the automorphism group of an unnodal Enriques surface can be. Furthermore, I will determine the automorphism group of a generic Enriques surface with smooth K3 cover in arbitrary characteristic, improving the corresponding result of W. Barth and C. Peters for very general Enriques surfaces over the complex numbers. |
Algebraic Geometry