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Number Theory Seminar
Seminar information archive ～04/27｜Next seminar｜Future seminars 04/28～
| Date, time & place | Wednesday 17:00 - 18:00 117Room #117 (Graduate School of Math. Sci. Bldg.) |
|---|---|
| Organizer(s) | Naoki Imai, Shane Kelly |
2023/01/18
17:00-18:00 Hybrid
Kestutis Cesnavicius (Paris-Saclay University)
The affine Grassmannian as a presheaf quotient (English)
Kestutis Cesnavicius (Paris-Saclay University)
The affine Grassmannian as a presheaf quotient (English)
[ Abstract ]
The affine Grassmannian of a reductive group G is usually defined as the étale sheafification of the quotient of the loop group LG by the positive loop subgroup. I will discuss various triviality results for G-torsors which imply that this sheafification is often not necessary.
The affine Grassmannian of a reductive group G is usually defined as the étale sheafification of the quotient of the loop group LG by the positive loop subgroup. I will discuss various triviality results for G-torsors which imply that this sheafification is often not necessary.
