Algèbre, géométrie, topologie

Curve classes on abelian varieties and stably irrational cubic threefolds

Name: Curve classes on abelian varieties and stably irrational cubic threefolds
Start: 2026-03-19T14:00:00+01:00
End: 2026-03-19T15:00:00+01:00
Location: No location set

par Olivier de Gaay Fortman (Utrecht University)

jeudi 19 mars 2026, 14:00 → 15:00 Europe/Paris

Description

We disprove the integral Hodge conjecture for abelian varieties and show that very general cubic threefolds are not stably rational. This is joint work with Philip Engel and Stefan Schreieder.