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Howard Levi (November 9, 1916, New York City – September 11, 2002, New York City) was an American mathematician who worked mainly in algebra and mathematical education.〔(''Notices of the AMS'', June/July 2003, Volume 50, Number 6, p. 705. )〕 Levi was very active during the educational reforms in the United States, having proposed several new courses to replace the traditional ones. ==Biography== Levi earned a Ph.D. in mathematics from Columbia University in 1942 as a student of Joseph Fels Ritt. Soon after obtaining his degree, he became a researcher on the Manhattan Project.〔Melvin Fitting – (The Four Color Theorem )〕〔For some details, consult: Mildred Goldberg – (Personal recollections of Mildred Goldberg, secretary to the theoretical group, SAM Laboratories, The Manhattan Project; 1943-1946 ) (Gilder Lehrman Institute of American History).〕 At Wesleyan University he led a group that developed a course of geometry for high school students that treated Euclidean geometry as a special case of affine geometry.〔Sitomer, H. – Coordinate geometry with an affine approach, Mathematics Teacher 57 (1964), 404–405.〕 Much of the Wesleyan material was based on his book ''Foundations of Geometry and Trigonometry''.〔C. Ray Wylie, (An Affine Approach to Euclidean Geometry (p. 237 from the PDF document, p. 231 from the document itself) )〕 His book ''Polynomials, Power Series, and Calculus'', written to be a textbook for a first course in calculus,〔Levi, Howard — An Experimental Course in Analysis for College Freshmen. ()〕 presented an innovative approach, and received favorable reviews by Leonard Gillman, who wrote "() this book, with its wealth of imaginative ideas, deserves to be better known." Levi's reduction process is named after him. In his last years, he tried to find a proof of the four color theorem that did not rely on computers.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Howard Levi」の詳細全文を読む スポンサード リンク
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