100, rue des maths 38610 Gières / GPS : 45.193055, 5.772076 / Directeur : Thierry Gallay

Stefan Schroer

Del Pezzo surfaces and Mori fiber spaces in positive characteristics
Mardi, 2 Octobre, 2018 - 10:30
Résumé : 

Over the complex numbers, the structure of Mori fiber spaces
on threefolds is basically understood. This is not so in characteristic p>0,
mainly due to higher-dimensional generalizations of quasielliptic fibrations.
Here we show that the situation is not as complicated as expected: There
are no Mori fibrations on smooth threefolds whose generic fibers are
geometrically non-normal surfaces. This is a joint work with Andrea Fanelli.

Institution de l'orateur : 
Heinrich-Heine-Universität Düsseldorf
Thème de recherche : 
Algèbre et géométries
Salle : 
logo uga logo cnrs