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A short proof of Cauchy’s polygonal number theorem

Author: Melvyn B. Nathanson
Journal: Proc. Amer. Math. Soc. 99 (1987), 22-24
MSC: Primary 11B83
MathSciNet review: 866422
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Abstract: This paper presents a simple proof that every nonnegative integer is the sum of $m + 2$ polygonal numbers of order $m + 2$.

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Keywords: Polygonal numbers, sums of squares, Cauchy-Fermat theorem
Article copyright: © Copyright 1987 American Mathematical Society