Talk:Jacobi's four-square theorem

Proof?
As far as I know there are several proofs to this theorem, and the one written in the article as "the" proof is not even the original one by Jacobi. There is a nice discussion in MathOverflow on the subject: http://mathoverflow.net/questions/84897/proofs-of-jacobis-four-square-theorem — Preceding unsigned comment added by 192.16.204.78 (talk) 20:06, 20 July 2015 (UTC)