I am giving a short presentation on Fermat's polygonal number theorem (any number may be written as the sum of n n-gonal numbers). I need books that provide some exposition/history on the theorem as well as a proof. I acquired Nathanson's Additive Number Theory from my university's library, but I'm not sure where to find more on the subject.(adsbygoogle = window.adsbygoogle || []).push({});

Oh, and the proofs should preferably be elementary, as I really know no number theory at all.

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# Need books/articles with proofs of polygonal number theorem

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