Programm des Emmy-Noether-Seminars
Fri, 28.10.2016, 14:30
Fri, 28.10.2016, 15:30
Combinatorial characterization of the weight monoids of smooth affine spherical varieties
Speaker: Bart Van Steirteghem (FAU & CUNY)
Let G be a connected complex reductive group. I. Losev has shown that a smooth affine spherical G-variety X is uniquely determined by its weight monoid, which is the set of irreducible representations of G that occur in the coordinate ring of X. This theorem had been conjectured by F. Knop, who also used it to show that multiplicity free (real) Hamiltonian manifolds are classified by their moment polytope and generic isotropy group.