The University of Michigan Combinatorics Seminar


Abstract 

Let G=G(m,m+p) be the Plucker embedding of the Grassmannian
of msubspaces in the real (m+p)dimensional space.
We consider a central projection of G into a projective space
of the same dimension as G.
Although G may be nonorientable, the topological degree
of this projection can be properly defined. Its values are
unsigned integers.
It turns out that when mp is even, the degree is independent
of the center of projection, so we call it deg G, the degree
of G.
