Seminario / Pelegrin
“Robertson-Walker cosmology and maximal hypersurfaces”
Speaker: Jose Antonio S. Pelegrin
Universidad de Granada
Aula Dottorato 15 /5/ 2017 alle ore 14:00
Abstract: In this talk we will study complete maximal hypersurfaces in the cosmological models known as Robertson-Walker spacetimes. In particular, we will focus on spatially open (n+1)-dimensional Robertson-Walker spacetimes with flat fiber, since recent observations have shown that they are suitable models to describe our universe. Under natural geometric and physical assumptions we will obtain new Calabi-Bernstein type results for these hypersurfaces that we will apply to some relevant spacetimes, such as the steady state spacetime, the Einstein-de Sitter spacetime and certain radiation models.