| Basic Mathematical Demonstrations: Lecture notes by Roger Seguin. |
| Saad, Nasser: University of Prince Edward Island. Applied mathematics and mathematical physics. |
| Sanghavi, Mihir: Describes a young college student's research interests and research group. |
| Schachermayer, Walter: Full Professor of Mathematics at Department of Statistics, Group for Actuarial and Financial Mathematics, University of Technology Vienna, Austria. |
| Schmitt, Lothar M.: Research activities in Mathematics (Functional Analysis), Computer Science (Genetic Algorithms) and Physics (Quantum Mechanics). |
| Sepp, Artur: Specializing in financial mathematics. Includes curriculum vitae, publications and lectures. From Estonia. |
| Seppala, Mike: Complex analysist and algebraist. |
| Silviu, Barza: University of Bucharest. Operations research. |
| Slinko, Arkadii: Senior lecturer at the department of Mathematics University of Auckland in new Zealand. Current research interests include applied algebra and combinatorics, as well as studying the math olympiads as an educational tool. |
| Smania, Daniel: Information about work on dynamical systems, including electronic preprints and references to published articles. |
| Stein, Elias M.: Wikipedia biography. |
| Stewart, Grisha: Math instructor at Highline Community College. Courses and publications. |
| Sudakov, Benny: Assistant Professor at the Department of Mathematics, Princeton University. Graphs, Algorithms. |