Subject
General Physics and Astronomy
Reference20 articles.
1. Semi-Riemannian Geometry with Applications to Relativity;OʼNeill,1983
2. Null Curves and Hypersurfaces of Semi-Riemannian Manifolds;Duffal,2007
3. Singularities of lightlike hypersurface in semi-Euclidean 4-space with index 2
4. The Lorentzian surfaces in semi-Euclidean 4-space with index 2
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