| MSC 1991 | Number of Preprints | |
| 20-XX | Group theory and generalizations
| 2 | browse |
| 20-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| 2 | browse |
| 20-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| 2 | browse |
| 20-02 | Research exposition (monographs, survey articles)
| 2 | browse |
| 20-03 | Historical
| 2 | browse |
| 20-04 | Explicit machine computation and programs (not the theory of computation or programming)
| 2 | browse |
| 20-06 | Proceedings, conferences, collections, etc.
| 2 | browse |
| 20Axx | Foundations
| 5 | browse |
| 20Bxx | Permutation groups
| 47 | browse |
| 20Cxx | Representation theory of groups
| 30 | browse |
| 20Dxx | Abstract finite groups
| 2 | browse |
| 20Exx | Structure and classification of infinite or finite groups
| 11 | browse |
| 20Fxx | Special aspects of infinite or finite groups
| 8 | browse |
| 20Gxx | Linear algebraic groups (classical groups)
| 21 | browse |
| 20Hxx | Other groups of matrices
| 6 | browse |
| 20Jxx | Connections with homological algebra and category theory
| 5 | browse |
| 20Kxx | Abelian groups
| 4 | browse |
| 20Lxx | Groupoids (i.e. small categories in which all morphisms are isomorphisms)
| - | |
| 20Mxx | Semigroups
| 14 | browse |
| 20Nxx | Other generalizations of groups
| 15 | browse |
| 20P05 | Probabilistic methods in group theory
| 1 | browse |