Virt: John Christian Ottem (Oslo): Enriques surface fibrations of even index

Name: Virt: John Christian Ottem (Oslo): Enriques surface fibrations of even index
Start: 2021-03-04T11:00:00+01:00
End: 2021-03-04T12:00:00+01:00
Location: batiment I

jeudi 4 mars 2021, 11:00 → 12:00 Europe/Paris

001 (batiment I)

001

batiment I

Département de mathématiques Bâtiment I Faculté des Sciences 2 Boulevard Lavoisier F-49045 Angers cedex 01 France

Description

I will explain a geometric construction of an Enriques surface fibration over P^1 of even index. This answers a question of Colliot-Thelene and Voisin, and provides new counterexamples to the Integral Hodge conjecture. This is joint work with Fumiaki Suzuki.

Virt: John Christian Ottem (Oslo): Enriques surface fibrations of even index​

001

batiment I

Virt: John Christian Ottem (Oslo): Enriques surface fibrations of even index