This semester we want to understand the paper "Projectivity of the Witt vector affine Grassmannian" by Bhatt and Scholze.
Program: program GrWaff.
Dates and location: Tuesdays, 14:00-15:30, in 05-426. It is also possible to participate via Zoom.
Zoom coordinates: Meeting ID: 912 4572 6486. Passcode: affinewitt
List of talks:
| Title | Date | Speaker | Notes | |
|---|---|---|---|---|
| 1 | Grothendieck topologies and flat descent | October 19 | Philipp Licht | |
| 2 | The h-topology | October 26 | Ariyan Javanpeykar | notes |
| 3 | Interlude: ∞-categories and sheaves of spaces | November 2 | Catrin Mair | notes |
| 4 | h-sheaves of spaces | November 9 | Georg Tamme | |
| 5 | Perfect schemes | November 16 | Cedric Luger | |
| 6 | Interlude: Witt vectors | November 23 | Rızacan Çiloğlu | notes |
| 7 | v-descent on perfect schemes, I | November 30 | Daniel Fink | |
| 8 | v-descent on perfect schemes, II | December 7+14 | Manuel Blickle | |
| 9 | Fiber-wise criteria, I | December 14 | Lorenzo Mantovani | |
| 10 | Fiber-wise criteria, II | January 4 | Thibaud van den Hove | |
| 11 | Families of torsion W(k)-modules | January 11 | Finn Bartsch | |
| 12 | The Demazure scheme | January 18 | Christian Dahlhausen | |
| 13 | The Witt vector affine Grassmannian | January 25 | Torsten Wedhorn | Two talks on January 25 |
| 14 | Projectivity of the Witt vector affine Grassmannian | January 25 | Patrick Bieker | Dinner afterwards |