Eigenvalue problems and Schubert calculus

Schubert calculus played a role in the solution to Horn's problem -- to characterize the possible eigenvalues of Hermitian matrices A, B, and A+B. We will describe this result, as well as some more recent results of a similar nature.

Refreshments will be served at 2:45 p.m. in the Faculty Lounge, Math Annex (Room 1115).