________________________________ From: Filippo Sarti via Assegnisti <assegnisti@lists.dm.unipi.it> Sent: Thursday, October 24, 2024 10:18:15 AM To: assegnisti@lists.dm.unipi.it; dottorandi@lists.dm.unipi.it; geometria_pisa@lists.dm.unipi.it Subject: [Assegnisti] Seminario di Geometria del 29 Ottobre 24 - Andrea Seppi Buongiorno, Ricordo a tutti gli interessati che il prossimo seminario di geometria sarà tenuto da Andrea Seppi e si terrà Martedì 29 Ottobre alle ore 14:30 presso l'aula Riunioni. Allego titolo e abstract: Titolo: Topology of convex projective four-manifolds Abstract: I will discuss topological obstructions for a closed four-manifold that admits a (real) properly convex projective structure. I will present a vanishing result on the Pontryagin classes, that in dimension four provides information on the geography problem for properly convex projective manifolds, and implies the solution to a question of Yves Benoist on the (in)compatibility of real convex projective structures and complex hyperbolic structures. Time permitting, I will also discuss the construction of examples that realize all possible positive values of the Euler characteristic. Based on joint work with Stefano Riolo and Leone Slavich. A presto, Filippo _______________________________________________ Assegnisti mailing list -- assegnisti@lists.dm.unipi.it To unsubscribe send an email to assegnisti-leave@lists.dm.unipi.it