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Journal Article

Ramanujan, Quadratic Forms, and the Sum of Three Cubes

James D. Harper
Mathematics Magazine
Vol. 86, No. 4 (October 2013), pp. 275-279
DOI: 10.4169/math.mag.86.4.275
Stable URL: http://www.jstor.org/stable/10.4169/math.mag.86.4.275
Page Count: 5

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Topics: Integers, Cubes, Diophantine equation, Binomials
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Ramanujan, Quadratic Forms, and the Sum of Three Cubes
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Abstract

Summary This article shows how, using only basic precalculus tools and a seed such as 33 + 43 + 53 = 63, to generate quadratic-form formulas for the Diophantine equation A3 + B3 + C3 = D3.

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