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.
Algebra Seminar
Monday, February 12, 2024 - 3:30pm
Kęstutis Česnavičius
Université Paris-Saclay
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