Hypersurfaces satisfying some curvature conditions in the semi-Euclidean space

We consider some conditions on conharmonic curvature tensor K  , which has many applications in physics and mathematics, on a hypersurface in the semi-Euclidean space Esn+1. We prove that every conharmonicaly Ricci-symmetric hypersurface M satisfying the condition K · R = 0 is pseudosymmetric. We also consider the condition K · K = LKQ(g, K  ) on hypersurfaces of the semi-Euclidean space Esn+1.