| 42C05 | Orthogonal functions and polynomials, general theory
[See also 33C45, 33C50, 33D45] |
| 42C10 | Fourier series in special orthogonal functions (Legendre polynomials, Walsh functions, etc.) |
| 42C15 | Series of general orthogonal functions, generalized Fourier expansions, nonorthogonal expansions |
| 42C20 | Rearrangements and other transformations of Fourier and other orthogonal series |
| 42C25 | Uniqueness and localization for orthogonal series |
| 42C30 | Completeness of sets of functions |
| 42C40 | Wavelets |
| 42C99 | None of the above, but in this section |
42B | 
42 | 
45