地点: 数学高等研究院报告厅

时间: 6月1日，16:00 - 17:00

报告人: Marc Besson（清华大学）

摘要:  I will discuss joint work with J. Hong and H. Yu on the reducedness conjecture. Given a simply-connected simple algebraic group G, we determine the tangent space of any Finkelberg-Mirković Schubert scheme at the base point of the affine Grassmannian of G. As a consequence, we exhibit non-reduced Finkelberg-Mirković Schubert schemes when G is of type E6, E7 and E8.