4 papers
On the structure vector field in lightlike hypersurfaces
Samuel Ssekajja
We study lightlike hypersurfaces of an indefinite almost contact metric-manifold . We prove that there are only two types of such hypersurfaces, known as ascreen and inasc…
Non-existence of certain lightlike hypersurfaces of an indefinite Sasakian manifold
Samuel Ssekajja
Here, we consider a lightlike hypersurface, tangent to the structure vector field, of an indefinite Sasakian manifold. We prove that no such a hypersurface can either have parallel…
On total mean curvatures of foliated half-lightlike submanifolds in semi-Riemannian manifolds
Fortuné Massamba, Samuel Ssekajja
We derive total mean curvature integration formulae of a three co-dimensional foliation on a screen integrable half-lightlike submanifold, in a semi-Rie…
Higher order mean curvatures of SAC half-lightlike submanifolds of indefinite almost contact manifolds
Fortuné Massamba, Samuel Ssekajja
We introduce higher order mean curvatures of screen almost conformal (SAC) half-lightlike submanifolds of indefinite contact manifolds, admitting a semi-symmetric non-metric connec…