Isogenies of Elliptic Curves over Function Fields
Event details
| Date | 13.04.2023 |
| Hour | 14:15 › 15:45 |
| Speaker | Richard Griffon (Université Clermont-Auvergne) |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
In this talk, we will first review the construction of cohomological DT invariants, a kind of virtual cohomology for moduli spaces of sheaves on Calabi-Yau threefolds. We will explain their construction by Brav, Bussi, Dupont, Joyce, and Szendroï, using perverse sheaves of vanishing cycles.
We will then present a toric localization formula for these invariants, which can be seen as a virtual version of the Bialinicky-Birula decomposition. The proof of this formula uses in a crucial way the formalism of hyperbolic localization and its interaction with perverse sheaves.
Practical information
- Informed public
- Free
Organizer
- Gauthier Leterrier
Contact
- Monique Kiener (if you want to attend to the seminar by zoom, please contact me, and I'll give you the link)