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A Simple Proof of Jacobi's Four-Square Theorem
M. D. Hirschhorn
Proceedings of the American Mathematical Society
Vol. 101, No. 3 (Nov., 1987), pp. 436-438
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2046384
Page Count: 3
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Jacobi's four-square theorem, which gives the number of representations of a positive integer as a sum of four squares, is shown to follow simply from the triple-product identity.
Proceedings of the American Mathematical Society © 1987 American Mathematical Society