MATHEMATICS SEMINARS - 2011 Wednesday, 28 September, at 14:30 hrs Dr. Rafael Herrera (CIMAT, Guanajuato, Mexico) "A suitable notion of octonionic spinor" Abstract: We explore the geometry of manifolds admitting a spin structure with a "Spin(7)twist" carrying a parallel spinor field. Venue: Luigi Stasi Seminar Room, ICTP Leonardo Building, first floor.