| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Orlando | L. | 1908 | Rome | Arithmetic, Algebra, Analysis |
| Pomey | L. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Pomey | L. | 1928 | Bologna | Analysis |
| Pontrjagin | L. | 1932 | Zurich | Geometry |
| Pontryagin | L. | 1970 | Nice | Plenary |
| Prandtl | L. | 1904 | Heidelberg | Applied Mathematics |
| Pukanszky | L. | 1970 | Nice | Analysis |
| Schlesinger | L. | 1904 | Heidelberg | History of Mathematics |
| Schlesinger | L. | 1904 | Heidelberg | Analysis |
| Schlesinger | L. | 1908 | Rome | Arithmetic, Algebra, Analysis |
| Schlesinger | L. | 1912 | Cambridge | Arithmetic, Algebra, Analysis |
| Schwartz | L. | 1950 | Cambridge (USA) | Plenary/Prize winner |
| Shilnikov | L. | 2002 | Beijing | Ordinary Differential Equations & Dynamical Systems |
| Siebenmann | L. | 1970 | Nice | Geometry & Topology |
| Silberstein | L. | 1912 | Cambridge | Arithmetic, Algebra, Analysis |
| Silberstein | L. | 1912 | Cambridge | Mechanics, Physical Mathematics, Astronomy |
| Silla | L. | 1928 | Bologna | Mechanics, Astronomy, Geodesy, Mathematical Physics, Theoretical Physics |
| Simon | L. | 1983 | Warszawa | Geometry |
| Stabilini | L. | 1928 | Bologna | Engineering and Industrial Applications |
| Stickelberger | L. | 1897 | Zurich | Arithmetic and Algebra |
| Tonelli | L. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Tonelli | L. | 1928 | Bologna | Analysis |
| Tschakaloff | L. | 1932 | Zurich | Analysis |
| Woollard | L. | 1924 | Toronto | Engineering |
| Pastur | L. A. | 1986 | Berkeley | Mathematical Physics |