Henry P. McKean has an outstanding record of research in the areas of Probability Theory, Partial Differential Equations, Complex Function Theory and Hamiltonian Mechanics. Since his 1955 Ph.D. from Princeton, he has published approximately 120 scientific papers and five monographs. He has been a Guggenheim Fellow and is a member of the American Academy of Arts and Sciences and the National Academy of Sciences. His research has been especially influential on such topics as one-dimensional diffusion processes (which play a central role in modern mathematical finance), the Boetzmann Equation (from Statistical Physics) and the complex geometry of integrable systems. Silver Professor; Professor of Mathematics B.A. 1952, Dartmouth; Ph.D. 1955, Princeton Eastman Professor, Balliol College, Oxford, 1978-1979; Guggenheim Fellow, 1973.