The local Cauchy problem in \(\mathbb{R}^2\) at a point where two characteristic curves have a common tangent

DOI10.1016/0022-0396(78)90025-6zbMath0383.35039OpenAlexW1977824341MaRDI QIDQ1248761

Bent Birkeland, Jan A. Persson

Publication date: 1978

Published in: Journal of Differential Equations (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0022-0396(78)90025-6

Mathematics Subject Classification ID

Wave equation (35L05) Initial value problems for second-order hyperbolic equations (35L15)

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Uniqueness in the characteristic Cauchy problem under a convexity condition

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