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Ramanujan, Quadratic Forms, and the Sum of Three Cubes
James D. Harper
Vol. 86, No. 4 (October 2013), pp. 275-279
Published by: Mathematical Association of America
Stable URL: http://www.jstor.org/stable/10.4169/math.mag.86.4.275
Page Count: 5
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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.
Copyright the Mathematical Association of America 2013