| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Aspinwall | Paul S. | 1998 | Berlin | Algebraic Geometry |
| Astala | Kari | 1998 | Berlin | Analysis |
| Atiyah | M. F. | 1962 | Stockholm | Topology & Differential Geometry |
| Atiyah | M. F. | 1966 | Moskva | Plenary |
| Atiyah | M. F. | 1970 | Nice | Geometry & Topology |
| Atiyah | M. F. | 1978 | Helsinki | Mathematical Physics & Mechanics |
| Aumann | R. J. | 1978 | Helsinki | Math Social & Biological Sciences |
| Auroux | Denis | 2010 | Hyderabad | Topology |
| Auslander | M. | 1962 | Stockholm | Algebra & Theory of Numbers |
| Auslander | M. | 1986 | Berkeley | Algebra |
| Autonne | L. | 1897 | Zurich | Analysis and Function Theory |
| Autonne | L. | 1904 | Heidelberg | Geometry |
| Autonne | L. | 1908 | Rome | Arithmetic, Algebra, Analysis |
| Autonne | Leon | 1900 | Paris | Number Theory and Algebra |
| Avellaneda | Marco | 1994 | Zurich | Applications of Mathematics in the Sciences |
| Avellaneda | Marco | 1998 | Berlin | Applications |
| Avila | Artur | 2010 | Hyderabad | Plenary |
| Ax | James | 1970 | Nice | Algebra |
| Ayoub | Joseph | 2014 | Seoul | Topology |
| Baake | Ellen | 2010 | Hyderabad | Mathematics in Science and Technology |
| Babai | László | 1990 | Kyoto | Mathematical Aspects of Computer Science |
| Babai | László | 1994 | Zurich | Plenary |
| Babini | J. | 1928 | Bologna | Analysis |
| Badesco | Radu | 1932 | Zurich | Analysis |
| Badesco | Radu | 1936 | Oslo | Analysis |