Jürgen Moser

Jürgen K. Moser
Born	(1928-07-04)July 4, 1928 Königsberg, Province of East Prussia, Prussia, German Reich
Died	December 17, 1999(1999-12-17) (aged 71) Schwerzenbach, Kanton Zürich, Switzerland
Citizenship	American
Nationality	German
Fields	Mathematics, Mathematical Analysis, Dynamical Systems, Celestial Mechanics, Partial Differential Equations, Complex Analysis
Institutions	New York University, MIT, ETH Zurich
Alma mater	University of Göttingen
Doctoral advisor	Franz Rellich Carl Ludwig Siegel
Doctoral students	Charles Conley Håkan Eliasson
Other notable students	Mark Adler Paul Rabinowitz
Known for	Kolmogorov–Arnold–Moser theorem, Calogero-Moser system, Chern-Moser invariants, de Giorgi-Nash-Moser estimates, Moser's Harnack inequality, Moser normal form, Moser iteration, Nash-Moser theorem, Moser's trick, Moser twist theorem
Influences	Carl Gustav Jacob Jacobi, Henri Poincaré, George David Birkhoff, Carl Ludwig Siegel
Influenced	Sun-Yung Alice Chang, Michel Herman, John Mather, Peter Sarnak, Alexander Petrovich Veselov, Paul C. Yang, Eduard Zehnder
Notable awards	George David Birkhoff Prize (1968) James Craig Watson Medal (1969) Wolf Prize Cantor Medal (1992)

Jürgen Kurt Moser (July 4, 1928 – December 17, 1999) was an award-winning, German-American mathematician, honored for work spanning over 4 decades, including Hamiltonian dynamical systems and partial differential equations.

Moser's mother Ilse Strehlke was a niece of the violinist and composer Louis Spohr. His father was the neurologist Kurt E. Moser (July 21, 1895 – June 25, 1982), who was born to the merchant Max Maync (1870–1911) and Clara Moser (1860–1934). The latter descended from 17th century French Hugenot immigrants to Prussia. Jürgen Moser's parents lived in Königsberg, German empire and resettled in Stralsund, East Germany as a result of the second world war. Moser attended the Wilhelmsgymnasium (Königsberg) in his hometown, a high school specializing in mathematics and natural sciences education, from which David Hilbert had graduated in 1880. His older brother Friedrich Robert Ernst (Friedel) Moser (August 31, 1925 – January 14, 1945) served in the German Army and died in Pillkallen/Schloßberg (East Prussia).

Moser married the biologist Dr. Gertrude C. Courant (Richard Courant's daughter, Carl Runge's granddaughter and great-granddaughter of Emil DuBois-Reymond) on September 10, 1955 and took up permanent residence in New Rochelle, New York in 1960, commuting to work in New York City. In 1980 he moved to Switzerland, where he lived in Schwerzenbach near Zürich. He was a member of the Akademisches Orchester Zürich. He was survived by his younger brother, the photographic printer and processor Klaus T. Moser-Maync from Northport, New York, his wife, Gertrude Moser from Seattle, their daughters, the theater lighting designer Nina S. Moser from Seattle and the mathematician Lucy I. Moser-Jauslin from Dijon, and his stepson, the lawyer Richard D. Emery from New York City. Moser played the piano and the cello, performing chamber music since his childhood in the tradition of a musical family, where his father played the violin and his mother the piano. He was a lifelong amateur astronomer and took up paragliding in 1988 during a visit at IMPA in Rio de Janeiro.

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