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Jerrold E. Marsden. Born August 17th, 1942 in Ocean Falls, British Columbia, Canada. He gained his B.Sc. in Mathematics at the University of Toronto and his Ph.D. at the Princeton University in 1968. Thereafter, he has worked at various universities and research institutes in the USA, Canada, the United Kingdom, France and Germany. Today he is the is Carl F. Braun Professor of Engineering and Control & Dynamical Systems at the California Institute of Technology. Professor Marsden, together with Vladimir Igorevich Arnol'd and Alan Weinstein is one of the world leading authorities in mathematical and theoretical classical mechanics, who has laid much of the foundation for the symplectic/metaplectic theory. He had the Marsden-Weinstein quotient named after him.