Geodesic spheres and isometric flows
Geometry of Kähler metrics and foliations by holomorphic discs
Geometry of the Complex Homogeneous Monge-Ampère Equation.
Global geometric structures associated with dynamical systems admitting normal shift of hypersurfaces in Riemannian manifolds.
Groupoïdes riemanniens.
We propose a definition of a Riemannian groupoid, and we show that the Stefan foliation that it induces is a Riemannian (singular) foliation. We also prove that the homotopy groupoid of a Riemannian (regular) foliation is a Riemannian groupoid.