A short proof of Cauchy’s polygonal number theorem

A short proof of Cauchy’s polygonal number theorem
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Proc. Amer. Math. Soc. 99 (1987), 22-24

DOI: https://doi.org/10.1090/S0002-9939-1987-0866422-3

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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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