Title    name
2009 Algebraic Geometry Workshop at KAIST
  Speaker Insong Choe
  Date 2009-04-09
  Place KAIST
  File  의 1 번째 Real Media 동영상입니다.
Abstract : In this talk, we discuss some generalizations of the old result of Lange and Narasimhan on the Segre invariant of rank 2 bundles over a curve. We consider the Segre invariants of the bundles of higher rank and reprove the Hirschowitz bound by using the secant varieties related to the ruled variety over the curve. We also study the Segre stratification on the moduli space of symplectic bundles of rank 4. This is a joint work with G. H. Hitching.