Seminario dott. L. Biliotti
Il dott. Leonardo Biliotti (Univ. di Parma) terrà un seminario dal titolo
"Coadjoint orbitopes"
il giorno Giovedi 3 Maggio 2012 alle ore 11.30 nella sala conferenze "F.Tricerri" del Dipartimento di Matematica "U.Dini".
Abstract: We study coadjoint orbitopes, i.e. convex hulls of coadjoint orbits of compact Lie groups. We show that up to conjugation the faces are completely determined by the geomety of the faces of the convex hullof Weyl group orbits. We also consider the geometry of the faces and show that they are themselves coadjoint orbitopes. From the complex
geometric point of view the sets of extreme points of a face are realized as compact orbits of parabolic subgroups of the complexified group. This is a joint work with Alessandro Ghigi and Peter Heinzner.