scientific article; zbMATH DE number 3517625
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Publication:4097643
zbMath0331.35045MaRDI QIDQ4097643
Publication date: 1976
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Initial value problems for second-order hyperbolic equations (35L15) Partial differential equations of mixed type and mixed-type systems of partial differential equations (35M99)
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The local Cauchy problem in \(R^2\) at a point where two characteristic curves have a common tangent
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