Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications Viola Eckelt new freedoms in regard to

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Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications Viola Eckelt new freedoms in regard toThis book is about the light like (degenerate) geometry of submanifolds needed to fill a gap in the general theory of submanifolds. The growing importance of light like hypersurfaces in mathematical physics, in particular their extensive use in relativity, and very limited information available on the general theory of lightlike submanifolds, motivated the present authors, in 1990, to do collaborative research on the subject matter of this book. Based