40-XX | 39 | Top | 41 |
| 40-00 | General reference works (handbooks, dictionaries, bibliographies, etc.) |
| 40-01 | Instructional exposition (textbooks, tutorial papers, etc.) |
| 40-02 | Research exposition (monographs, survey articles) |
| 40-03 | Historical (must also be assigned at least one classification number from Section 01) |
| 40-04 | Explicit machine computation and programs (not the theory of computation or programming) |
| 40-06 | Proceedings, conferences, collections, etc. |
| 40Axx | Convergence and divergence of infinite limiting processes |
| 40B05 | Multiple sequences and series {(should also be assigned at least one other classification number in this section)} |
| 40Cxx | General summability methods |
| 40Dxx | Direct theorems on summability |
| 40Exx | Inversion theorems |
| 40F05 | Absolute and strong summability |
| 40Gxx | Special methods of summability |
| 40H05 | Functional analytic methods in summability |
| 40J05 | Summability in abstract structures [See also 43A55, 46A35, 46B15] |