Hebrew University Amitsur Algebra Seminar ---------------------------------- Time: Thursday, March 14, 12:00-13:15 Place: math 209 Speaker: Lucas Fresse (HebrewU) Title: Singular locus of certain varieties of flags Abstract: Let V be a complex vector space of finite dimension. A (complete) flag is a maximal chain of subspaces of V. The set of all flags of V is an algebraic projective variety and it admits several remarkable subvarieties. The Schubert varieties are the most classical example. Other remarkable subvarieties are the Springer fibers: given a nilpotent endomorphism u of V, one calls Springer fiber the set of all flags which are stable by u. In this talk, we recall a classical result due to Lakshmibai and Seshadri which describes the set of the singular points of a Schubert variety. Then, we propose a result of the same type describing the set of the singular points of the irreducible components of a Springer fiber. You are cordially invited! <http://math.huji.ac.il/amitsur.html> --------------------------------------------------------- Technion Math Net-2 (TECHMATH2) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: Konstantin Golubev <kgolubev@gmail.com>