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35-XX - Partial differential equations [MSC 2020] |
35A22 - Transform methods (e.g. integral transforms) applied to PDEs [MSC 2020] |
35A27 - Microlocal methods and methods of sheaf theory and homological algebra applied to PDEs [MSC 2020] |
35L05 - Wave equation [MSC 2020] |
35L67 - Shocks and singularities for hyperbolic equations [MSC 2020] |
35L70 - Second-order hyperbolic equations [MSC 2020] |
58J47 - Propagation of singularities; initial value problems on manifolds [MSC 2020] |