| MSC 1991 | Number of Preprints | |
| 19-XX | $K$-theory
| 388 | browse |
| 19-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| 388 | browse |
| 19-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| 388 | browse |
| 19-02 | Research exposition (monographs, survey articles)
| 388 | browse |
| 19-03 | Historical
| 388 | browse |
| 19-04 | Explicit machine computation and programs (not the theory of computation or programming)
| 388 | browse |
| 19-06 | Proceedings, conferences, collections, etc.
| 388 | browse |
| 19Axx | Grothendieck groups and $K_0$
| - | |
| 19Bxx | Whitehead groups and $K_1$
| - | |
| 19Cxx | Steinberg groups and $K_2$
| 3 | browse |
| 19Dxx | Higher algebraic $K$-theory
| 17 | browse |
| 19Exx | $K$-theory in geometry
| 3 | browse |
| 19Fxx | $K$-theory in number theory
| - | |
| 19Gxx | $K$-theory of forms
| - | |
| 19Jxx | Obstructions from topology
| 1 | browse |
| 19Kxx | $K$-theory and operator algebras
| 7 | browse |
| 19Lxx | Topological $K$-theory
| - | |
| 19M05 | Miscellaneous applications of $K$-theory
| 2 | browse |