A history of the theory of the definite integral. 1930.

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A history of the theory of the definite integral. 1930.

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Sinkov, Abraham, 1907-

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Abraham Sinkov was cryptoanalyst in the United States (U.S.) military during World War (WWII) and as a civilian after the war. He was a member of a team that broke the Japanese PURPLE code in 1940. He helped to establish the Central Bureau under General MacArthur. He was Chief of Central Bureau at war's end. From the description of Abraham Sinkov papers, 1930-circa 1960, 23-24 February 1989. (US Army, Mil Hist Institute). WorldCat record id: 47185003 ...