Some results on the frame bundle of an almost contact metric manifold
Some rigidity results for spatially closed spacetimes
Some submersions of CR-hypersurfaces of Kähler-Einstein manifold.
Sous-variétés complexes d'Einstein de l'espace projectif
Sous-variétés lagrangiennes et lagrangiennes exactes des fibrés cotangents.
Spacelike hypersurfaces in de Sitter space with constant higher-order mean curvature.
Spacelike hypersurfaces with constant scalar curvature.
Spacelike Salkowski and anti-Salkowski curves with a spacelike principal normal in Minkowski 3-space.
Space-like surfaces in an anti-de Sitter space
Special cohomogeneity one isometric actions on irreducible symmetric spaces of types I and II.
Spectral Geometry of Compact Hermitian Symmetric Submanifolds.
Spectre du laplacien et longueurs des géodésiques périodiques. II
Spectre du laplacien et longueurs des géodésiques périodiques. I
Steiner's formula for the volume of a parallel hypersurface in a riemannian manifold
Submanifold averaging in Riemannian and symplectic geometry
We give a canonical construction of an “isotropic average” of given -close isotropic submanifolds of a symplectic manifold. For this purpose we use an improvement (obtained in collaboration with H. Karcher) of Weinstein’s submanifold averaging theorem and apply “Moser’s trick”. We also present an application to Hamiltonian group actions.
Submanifolds of a Lorentzian para-Sasakian manifold.
Submanifolds of Constant Mean Curvature.
Submanifolds of Euclidean space with parallel mean curvature vector.
Submanifolds of -structure manifold satisfying .
Submanifolds with harmonic mean curvature vector field in contact 3-manifolds
Biharmonic or polyharmonic curves and surfaces in 3-dimensional contact manifolds are investigated.