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35Sxx - Pseudodifferential operators and other generalizations of partial differential operators [MSC 2020] |
01-XX - History and biography [MSC 2020] |
49K20 - Optimality conditions for problems involving partial differential equations [MSC 2020] |
34K30 - Functional-differential equations in abstract spaces [MSC 2020] |
47Fxx - Partial differential operators [MSC 2020] |
47Gxx - Integral, integro-differential, and pseudodifferential operators [MSC 2020] |
45Bxx - Fredholm integral equations [MSC 2020] |
00Axx - General and miscellaneous specific topics [MSC 2020] |
65M70 - Spectral, collocation and related methods for initial value and initial-boundary value problems involving PDEs [MSC 2020] |
42Cxx - Nontrigonometric harmonic analysis [MSC 2020] |