| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Atiyah | M. F. | 1962 | Stockholm | Topology & Differential Geometry |
| Atiyah | M. F. | 1966 | Moskva | Plenary/Prize winner |
| Atiyah | M. F. | 1970 | Nice | Geometry & Topology |
| Atiyah | M. F. | 1978 | Helsinki | Mathematical Physics & Mechanics |
| Atiyah | Michael | 2018 | Rio de Janeiro | ICM Abel Lecture |
| Astala | Kari | 1998 | Berlin | Analysis |
| Aspinwall | Paul S. | 1998 | Berlin | Algebraic Geometry |
| Asok | Aravind | 2022 | Virtual | Algebraic and Complex Geometry |
| Askey | R. | 1983 | Warszawa | Real & Func. Analy. |
| Ásgeirsson | Leifur | 1936 | Oslo | Analysis |
| Aschenbrenner | Matthias | 2018 | Rio de Janeiro | Logic and Foundations |
| Aschbacher | M. | 1978 | Helsinki | Algebra |
| Artom | E. | 1928 | Bologna | Elementary Mathematics, Didactical Questions, Mathematical Logic |
| Artin | M. | 1966 | Moskva | Plenary |
| Artin | M. | 1970 | Nice | Algebra |
| Artigue | Michèle | 1998 | Berlin | Teaching & Popularization of Mathematics |
| Artigue | Michèle | 2006 | Madrid | Mathematics Education and Popularization of Mathematics |
| Arthur | J. | 1983 | Warszawa | Lie groups & representations |
| Arthur | James | 1998 | Berlin | Lie Groups |
| Arthur | James | 2014 | Seoul | Plenary |
| Arschanikoff | 1932 | Zurich | Mathematical-technical sciences and astronomy | |
| Arora | Sanjeev | 2002 | Beijing | Mathematical Aspects of Computer Science |
| Arora | Sanjeev | 2018 | Rio de Janeiro | Plenary |
| Arnold | D. | 2002 | Beijing | Plenary |
| Arnold | V. I. | 1958 | Edinburgh | Classical & Functional Analysis |