Chapter I : Geometry of Null Curves in a Minkowski Space-Time
Ch II : Null Hypersurfaces in Minkowski Space-Time
Ch III : Null Hypersurfaces in Lorentzian Manifolds
References
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Abstract
The study of differential grometry of null curves and null hypersurfaces in a pseudo-Euclidean or pseudo-rimannian space is not a simple task , since spaces have indefinite metric.