Penn Arts & Sciences Logo

Algebra Seminar

Monday, February 12, 2024 - 3:30pm

Kęstutis Česnavičius

Université Paris-Saclay


University of Pennsylvania

DRL 4N30

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.