4 papers
Einstein-Weyl structures on lightike hypersurfaces
Cyriaque Atindogbe, Lionel Bérard Bergery
We study Weyl structures on lightlikes hypersurfaces endowed with a conformal structure of certain type and specific screen distribution: the Weyl screen structures. We investigate…
A note on conformal connections on lightlike hypersurfaces
Cyriaque Atindogbe, Lionel Bérard Bergery
Degenerate submanifolds of pseudo-Riemannian manifolds are quite difficult to study because there is no prefered connection when the submanifold is not totally geodesic. For the pa…
-tensors on lightlike hypersurfaces
Cyriaque Atindogbe, Lionel Bérard Bergery
This paper introduces $\anabla$-tensors on lightlike hypersurfaces of signature , and investigates on their properties in connection with the null geom…
Reduction of the co-dimension of light-like isotropic sub-manifolds
Cyriaque Atindogbe, Jean-Pierre Ezin, Joël Tossa
We give a sufficient condition for a lightlike isotropic submanifold , of dimension , which is not totally geodesic in a semi-Riemannian manifold of constant curvature an…