| http://www.w3.org/ns/prov#value | - Polya's book is a rare event. . . . --Morris Kline, Scientific American Professor Polya . . . is interested in problem solving and the psychological aspects of mathematical discovery. . . . [These books] should provide many entertaining hours for anyone who cares to pick up the challenge.-- Carl Hammer, Journal of the Franklin Institute More editions of Induction and Analogy in Mathematics (Mat
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