ISSN : 1226-0657
In this paper, we study lightlike hypersurfaces of an indefinite Sasakian manifold <TEX>$\bar{M}$</TEX>. First, we construct a type of lightlike hypersurface according to the form of the structure vector field of <TEX>$\bar{M}$</TEX>, named by ascreen lightlike hypersurface. Next, we characterize the geometry of such ascreen lightlike hypersurfaces.
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