| MSC 1991 | Number of Preprints | |
| 33-XX | Special functions
| - | |
| 33-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| - | |
| 33-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| - | |
| 33-02 | Research exposition (monographs, survey articles)
| - | |
| 33-03 | Historical
| - | |
| 33-04 | Explicit machine computation and programs (not the theory of computation or programming)
| - | |
| 33-06 | Proceedings, conferences, collections, etc.
| - | |
| 33Bxx | Elementary classical functions
| 3 | browse |
| 33Cxx | Hypergeometric functions
| 21 | browse |
| 33Dxx | Basic hypergeometric functions
| 2 | browse |
| 33Exx | Other special functions
| 6 | browse |