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Richard Dagobert Brauer : ウィキペディア英語版
Richard Brauer

Richard Dagobert Brauer (February 10, 1901 – April 17, 1977) was a leading German and American mathematician. He worked mainly in abstract algebra, but made important contributions to number theory. He was the founder of modular representation theory.
==Education and career==
Alfred Brauer was Richard's brother and seven years older. Alfred and Richard were both interested in science and mathematics, but Alfred was injured in combat in World War I. As a boy, Richard dreamt of becoming an inventor, and in February 1919 enrolled in Technische Hochschule Berlin-Charlottenburg. He soon transferred to University of Berlin. Except for the summer of 1920 when he studied at University of Freiburg, he studied in Berlin, being awarded his doctorate 16 March 1926. Issai Schur conducted a seminar and posed a problem in 1921 that Alfred and Richard worked on together, and published a result. The problem also was solved by Heinz Hopf at the same time. Richard wrote his thesis under Schur, providing an algebraic approach to irreducible, continuous, finite-dimensional representations of real orthogonal (rotation) groups.
Ilse Karger also studied mathematics at the University of Berlin; she and Richard were married 17 September 1925. Their boys George Ulrich (b 1927) and Fred Gunther (b 1932) also became mathematicians. Brauer began his teaching career in Königsberg (now Kaliningrad) working as Konrad Knopp’s assistant. Brauer expounded central division algebras over a perfect field while in Königsberg; the isomorphism classes of such algebras form the elements of the Brauer group he introduced.
When the Nazi Party took over in 1933, the Emergency Committee in Aid of Displaced Foreign Scholars took action to help Brauer and other Jewish scientists.〔 Brauer was offered an assistant professorship at University of Kentucky. Richard accepted the offer, and by the end of 1933 he was in Lexington, Kentucky, teaching in English.〔 Ilse followed the next year with George and Fred; brother Alfred made it to the USA in 1939, but their sister Alice was killed in The Holocaust.〔Bergmann, Birgit; Epple, Moritz; and Ungar, Ruti. (''Transcending Tradition: Jewish Mathematicians in German Speaking Academic Culture'' ), p. 54. Springer, 2012. ISBN 3642224636. Accessed February 25, 2013. "Schur's disciple Alfred Brauer was the last Jewish mathematician who managed to complete his habilitation and become Privatdozent at the University of Berlin before the Nazi regime began. Brauer escaped to the USA in 1939, joining his brother Richard (1901-1977) who had fled in 1933."〕
Hermann Weyl invited Richard to assist him at Princeton's Institute for Advanced Study in 1934. Richard and Nathan Jacobson edited Weyl's lectures ''Structure and Representation of Continuous Groups''. Through the influence of Emmy Noether, Richard was invited to University of Toronto to take up a faculty position. With his graduate student Cecil J. Nesbitt he developed modular representation theory, published in 1937. Robert Steinberg, and Stephen Arthur Jennings were also Brauer’s students in Toronto. Brauer also conducted international research with Tadasi Nakayama on representations of algebras. In 1941 University of Wisconsin hosted visiting professor Brauer. The following year he visited the Institute for Advanced Study and Bloomington, Indiana where Emil Artin was teaching.
In 1948 Richard and Ilse moved to Ann Arbor, Michigan where he and Robert M. Thrall contributed to the program in modern algebra at University of Michigan. With his graduate student K. A. Fowler, Brauer proved the Brauer-Fowler theorem. Donald John Lewis was another of his students at UM.
In 1952 Brauer joined the faculty of Harvard University. Before retiring in 1971 he taught aspiring mathematicians such as Donald Passman and I. Martin Isaacs. The Brauers frequently traveled to see their friends such as Reinhold Baer, Werner Wolfgang Rogosinski, and Carl Ludwig Siegel.

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