Let (M, g) be a smooth manifold M endowed with a metric g. A large class of differential operators in differential geometry is intrinsically defined by means of the dual metric g ∗ on the dual bundle T M ∗ of 1-forms on M. If the metric g is (semi [...]
ATINDOGBE COMLAN CYRIAQUE [1], TOSSA JOEL [3], EZIN JEAN-PIERRE [2],
We study and characterize a class of lightlike hypersurfaces in Lorentzian manifolds of constant curvature, that satisfy Einstein equation. Integrability and characterization results are established. [...]
ATINDOGBE COMLAN CYRIAQUE [1], EZIN JEAN-PIERRE [2], TOSSA JOEL [3],
This paper deals with results concerning the relative nullity foliation of the screen distribution of a lightlike Einstein hypersurface $M$ in the Lorentzian space $\mathbb{R}^{n+2}_{1}$ and gives a characterization theorem for t [...]
ATINDOGBE COMLAN CYRIAQUE [1], EZIN JEAN-PIERRE [2], TOSSA JOEL [3],