Generalized Cauchy-Riemann lightlike submanifolds of indefinite Sasakian manifolds
We study a class of submanifolds, called Generalized Cauchy-Riemann (GCR) lightlike submanifolds of indefinite Sasakian manifolds as an umbrella of invariant, screen real, contact CR lightlike subcases  and real hypersurfaces . We prove existence and non-existence theorems and a characterization theorem on minimal GCR-lightlike submanifolds.
Key words and phrasesdegenerate metric CR-submanifolds Sasakian manifolds
2000 Mathematics Subject Classification53C15 53C40 53C50
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