PARALLEL AND SEMIPARALLEL LIGHTLIKE HYPERSURFACES OF SEMI-RIEMANNIAN SPACE FORMS

Abstract

In this paper, some properties of lightlike hypersurfaces with parallel and semiparallel second fundamental forms are investigated in semi-Riemannian space forms. Then some generalizations of these conditions are performed.

Keywords

• Lightlike hypersurfaces,parallel,semiparallel,semi-Riemannian space forms,2-parallel,2-semiparallel

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