The 1998 Laureates / Basic Sciences Category / Mathematical Science
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Kiyosi Itô

Japan / September 7, 1915 - 2008
Mathematician; Professor Emeritus, Kyoto University

“Fundamental Contribution to the Stochastic Analysis, through His Invention of Stochastic Differential Equations, Which Have Been Applied in Various Sciences ”
Dr. Itô made great contributions to the advancement not only of mathematical sciences, but also of physics, engineering, biology and economics, through his research in stochastic analysis, especially his invention of stochastic differential equations, which enable us to describe random motions and random phenomena in nature and society.

BRIEF BIOGRAPHY
1915
Born in Hokusei-cho, Mie Prefecture, Japan
1938
Graduated from The Imperial University of Tokyo (Mathematics, Faculty of Science)
1939-1943
The Statistics Bureau of the Cabinet Secretariat
1943-1952
Assistant Professor, Faculty of Science, The Nagoya Imperial University
1945
D. Sc., The Imperial University of Tokyo
1952-1979
Professor, Kyoto University
1954-1956
Researcher, The Institute for Advanced Study, Princeton
1966-1969
Professor, Aarhus University
1969-1975
Professor, Cornell University
1976-1979
Director, Research Institute for Mathematical Sciences, Kyoto University
1979-1985
Professor, Gakushuin University
1979-present
Professor Emeritus, Kyoto University

AWARDS AND HONORS
1978
The Asahi Prize, Japan
1978
The Imperial Prize and The Japan Academy Prize
1985
The Fujiwara Prize, Japan
1987
The Wolf Prize, Israel
 
Associate Foreign Member, Acadêmie des Sciences, France
Honorary Doctor of Mathematics, ETH, Zürich
Member of The Japan Academy; Degree of Doctor of Science, Honararis
Causa, The University of Warwick; Foreign Member, National Academy of Science, U. S. A.

MAJOR WORKS
1942
On stochastic processes (1) (infinitely divisible laws of probability) Japanese Journal of Mathematics 18
1951
On a formula concerning stochastic differentials, Nagoya Mathematical Journal 3
1951
On stochastic differential equations, Memoirs of the American Mathematical Society 4
1965
Diffusion Processes and Their Sample Paths, Grundlehren der Math. Wiss. 125 (with H. P. McKean, Jr.) Springer-Verlag
1987
Kiyosi Itô, Selected Papers (D. W. Stroock and S. R. S. Varadhan, eds.) Springer-Verlag
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