COLLOQUIUM Cyriaque Atindogbé : "Hypersurfaces in presence of conformal vector fields"

by Cyriaque Atindogbé (Université d'Abomey-Calavi)

Salle René Baire (IMB)

Salle René Baire (IMB)


A smooth vector field on a pseudo-Riemannian manifold $(M,g)$ is conformal whenever its local flow leaves invariant the conformal class $[g]$. In Lorentzian spaces, we highlight how the presence of such vector fields affects the geometry and the topology of various kinds of hypersurfaces.