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Characteristic initial data and wavefront singularities in general relativity. (English) Zbl 0513.58043

MSC:
58J45 Hyperbolic equations on manifolds
35L67 Shocks and singularities for hyperbolic equations
83C05 Einstein’s equations (general structure, canonical formalism, Cauchy problems)
58C25 Differentiable maps on manifolds
58K99 Theory of singularities and catastrophe theory
35L05 Wave equation
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