A Congruence Modulo Four for Real Schubert Calculus with Isotropic Flags Academic Article uri icon


  • © Canadian Mathematical Society 2017. We previously obtained a congruence modulo four for the number of real solutions to many Schubert problems on a square Grassmannian given by osculating flags. Here we consider Schubert problems given by more general isotropic flags, and prove this congruence modulo four for the largest class of Schubert problems that could be expected to exhibit this congruence.

author list (cited authors)

  • Hein, N., Sottile, F., & Zelenko, I.

citation count

  • 0

publication date

  • June 2017