Il 21 e 22 Maggio 2025, per il ciclo “Crossings - Math Seminars”, Gérard Besson (Université Grenoble Alpes) terrà i seguenti interventi:
#1
Technical Seminar: On the intrinsic geometry of horospheres in negative curvature
Abstract: There are classical results showing that if a negatively closed manifold has its horospheres of constant mean curvature then it is locally symmetric. Here we shall present a rigidity result involving the intrinsic Riemannian structure of these horospheres. More precisely if one of them is flat than the closed manifold is locally real hyperbolic.
Data e ora: Mercoledì 21 Maggio, ore TBA
Luogo: TBA - Università di Milano-Bicocca
Orario e luogo dell’evento saranno annunciati a breve
#2
Math Forum: Some curious open manifolds
Abstract: We shall describe the construction of an open $3$-manifold called the Whitehead Manifold. The construction uses a knot in $S^3$ and variations on it produce a non countable family of strange objects. Very little is known on the Riemannian geometry and the analysis that they carry and we may mention some questions. They also play an important role in dimension 4. The construction will be presented with easy tools.
Data e ora: Giovedì 22 Maggio, ore 15:00
Luogo: Edificio U4-08 (Aula Sironi), Piazza della Scienza, 4 - Università di Milano-Bicocca
Al termine dei seminari seguirà un coffee break
Visita la pagina dedicata agli eventi della serie: