Orateur
Stéphane Bijakowski
Description
After recalling the geometry of the special fiber of the modular curve, I will talk about possible generalizations to Shimura varieties.
I will explain why the situation is more involved when ramification appears, and why one is led to use models defined by Pappas and Rapoport. I will then define an analogous of the ordinary locus in this context.
This is joint work with V. Hernandez.
