Colloquium

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

## by Cyriaque Atindogbé (Université d'Abomey-Calavi)

Europe/Paris
Salle René Baire (IMB)

#### Salle René Baire (IMB)

Description

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.