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zbMath0636.35048MaRDI QIDQ3775913

F. G. Friedlander

Publication date: 1987

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

Dirichlet problem smooth boundary closed geodesics spectral invariant compact smooth Riemannian manifold diffraction of singularities billiard ball trajectories

Mathematics Subject Classification ID

Initial-boundary value problems for second-order hyperbolic equations (35L20) Shocks and singularities for hyperbolic equations (35L67) Geodesics in global differential geometry (53C22) Geometric theory, characteristics, transformations in context of PDEs (35A30) Variational problems in applications to the theory of geodesics (problems in one independent variable) (58E10)

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