Fields Medals 1998
Richard E. Borcherds
Cambridge University; Kac-Moody algebras, automorphic forms
W. Timothy Gowers
Cambridge University; Banach space theory, combinatorics
Maxim Kontsevich
IHES Bures-sur-Yvette; mathematical physics, algebraic geometry and topology
Curtis T. McMullen
Harvard University; complex dynamics, hyperbolic geometry