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George David Birkhoff, American mathematician (died 1944)

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George David Birkhoff
American mathematician (1884–1944)
George David Birkhoff was one of the top American mathematicians of his generation. He made valuable contributions to the theory of differential equations, dynamical systems, the four-color problem, the three-body problem, and general relativity. Today, Birkhoff is best…Source: Wikipedia (CC BY-SA)