DRINFELD, VLADIMIR GERSHONOVICH

born Feb. 14, 1954, Kharkov, Ukraine, U.S.S.R. [now Kharkiv, Ukraine] Soviet mathematician who was awarded the Fields Medal in 1990 for his work in algebraic geometry and mathematical physics. Drinfeld attended Moscow State University and the V.A. Steklov Institute of Mathematics, Moscow (Ph.D., 1988). He joined the Institute for Low Temperature Physics and Engineering in Kharkov in 1985. Drinfeld was awarded the Fields Medal at the International Congress of Mathematicians in Kyoto, Japan, in 1990. His principal contributions have been in the theory of automorphic forms, algebraic geometry, and number theory. His interest in the last two led to his working on the Langlands Program, where he solved Langlands' conjecture for a special but important case concerning Galois groups. His work in this area extended earlier explorations by Alexandre Grothendieck, Pierre Deligne, and Robert P. Langlands. Drinfeld also conducted research in mathematical physics, developing a classification theorem for quantum groups (a subclass of Hopf algebras). He also introduced the ideas of the Poisson-Lie group and Poisson-Lie actions in his work on Yang-Baxter equations, work also related to the quantum groups.