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26-XX - Real functions [MSC 2020] |
26Axx - Functions of one variable [MSC 2020] |
42Axx - Harmonic analysis in one variable [MSC 2020] |
40-XX - Sequences, series, summability [MSC 2020] |
34A12 - Initial value problems, existence, uniqueness, continuous dependence and continuation of solutions to ordinary differential equations [MSC 2020] |
26Bxx - Functions of several variables [MSC 2020] |
54Exx - Topological spaces with richer structures [MSC 2020] |
40Axx - Convergence and divergence of infinite limiting processes [MSC 2020] |
26Exx - Miscellaneous topics in real functions [MSC 2020] |
33Bxx - Elementary classical functions [MSC 2020] |