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John von Neumann (1903-1957) was a Hungarian born mathematician who immigrated to the United States when Hitler rose to power. He was a child prodigy who contributed a broad range of fields, include [[Quantum Mechanics]] [[Game theory]] and [[computer science]]. He is credited with doing early work on the modern digital computer called [[von Neumann architecture]] and the application of operator theory to quantum mechanics. He was a member of the Manhattan Project who later worked with [[Edward Teller]] and [[Stanislaw Ulam]] to develop the steps for thermonuclear reactions necessary to build the hydrogen bomb.