Fermat. The proof is not easy. Probably the best way to prove this is to work in where called the Eisenstein integers. And even that proof is not so trivial.

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- Feb 25th 2008, 07:26 PM #1

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- Feb 25th 2008, 07:30 PM #2

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Fermat. The proof is not easy. Probably the best way to prove this is to work in where called the Eisenstein integers. And even that proof is not so trivial.