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35-XX - Partial differential equations [MSC 2020] |
35S05 - Pseudodifferential operators as generalizations of partial differential operators [MSC 2020] |
58J50 - Spectral problems; spectral geometry; scattering theory on manifolds [MSC 2020] |
47Fxx - Partial differential operators [MSC 2020] |
35P25 - Scattering theory for PDEs [MSC 2020] |
58J40 - Pseudodifferential and Fourier integral operators on manifolds [MSC 2020] |
58J32 - Boundary value problems on manifolds [MSC 2020] |
58J47 - Propagation of singularities; initial value problems on manifolds [MSC 2020] |
47G30 - Pseudodifferential operators [MSC 2020] |