Lightlike hypersurfaces in indefinite $\mathcal{S}$-manifolds

Details Lightlike hypersurfaces in indefinite $\mathcal{S}$-manifolds Lightlike hypersurfaces in indefinite $\mathcal{S}$-manifolds

2008-03-27

arxiv.org/abs/0803.3896v1

Mathematics

Differential Geometry

19 pages, no figures

Scientific paper

In a metric $g.f.f$-manifold we study lightlike hypersurfaces $M$ tangent to the characteristic vector fields, and owing to the presence of the $f$-structure, we determine some decompositions of $TM$ and of a chosen screen distribution obtaining two distributions invariant with respect to the structure. We discuss the existence of a $g.f.f$-structure on a lightlike hypersurface and, under suitable hypotheses, we obtain an indefinite $\mathcal{S}$-structure on the leaves of an integrable distribution. The existence of totally umbilical lightlike hypersurfaces of an indefinite $\mathcal{S}$-space form is also discussed. Finally, we explicitely describe a lightlike hypersurface of an indefinite $\mathcal{S}$-manifold.

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