44-XX | 43 | Top | 45 |
| 44-00 | General reference works (handbooks, dictionaries, bibliographies, etc.) |
| 44-01 | Instructional exposition (textbooks, tutorial papers, etc.) |
| 44-02 | Research exposition (monographs, survey articles) |
| 44-03 | Historical (must also be assigned at least one classification number from Section 01) |
| 44-04 | Explicit machine computation and programs (not the theory of computation or programming) |
| 44-06 | Proceedings, conferences, collections, etc. |
| 44A05 | General transforms [See also 42A38] |
| 44A10 | Laplace transform |
| 44A12 | Radon transform [See also 92C55] |
| 44A15 | Special transforms (Legendre, Hilbert, etc.) |
| 44A20 | Transforms of special functions |
| 44A30 | Multiple transforms |
| 44A35 | Convolution |
| 44A40 | Calculus of Mikusiński and other operational calculi |
| 44A45 | Classical operational calculus |
| 44A55 | Discrete operational calculus |
| 44A60 | Moment problems |
| 44A99 | Miscellaneous topics |