Birational Invariants from Gromov-Witten Theory (3/4)

by Maxim Kontsevich (IHES)

Tuesday Nov 21, 2023, 10:30 AM → 12:30 PM Europe/Paris

Centre de conférences Marilyn et James Simons (IHES)

Gromov-Witten invariants of a smooth projective variety give an infinite tower of cohomology classes on powers of the original variety, satisfying a beautiful system of constraints encoded in the notion of quantum connection.
Recently Hiroshi Iritani proved a result controlling the quantum connection of the blowup along a smooth center.
The goal of the course is to introduce a new class of birational invariants based on Iritani's theorem.
In particular, one can almost effortlessly prove the non-rationality of a generic cubic 4-fold.

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