| MSC 1991 | Number of Preprints | |
| 31-XX | Potential theory
| 1 | browse |
| 31-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| 1 | browse |
| 31-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| 1 | browse |
| 31-02 | Research exposition (monographs, survey articles)
| 1 | browse |
| 31-03 | Historical
| 1 | browse |
| 31-04 | Explicit machine computation and programs (not the theory of computation or programming)
| 1 | browse |
| 31-06 | Proceedings, conferences, collections, etc.
| 1 | browse |
| 31Axx | Two-dimensional theory
| 10 | browse |
| 31Bxx | Higher-dimensional theory
| 9 | browse |
| 31Cxx | Other generalizations
| 8 | browse |
| 31D05 | Axiomatic potential theory
| - | |