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
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!
Technion Math Net-2 (TECHMATH2)
Editor: Michael Cwikel   <techm@math.technion.ac.il> 
Announcement from: Konstantin Golubev   <kgolubev@gmail.com>