And more recently Christopher gave a partition - theoretic proof .
Simplifying an earlier short proof due to Heath - Brown ( who was inspired by Liouville 's idea ) , Zagier presented a one - sentence proof of Fermat 's assertion .
More recently Christopher gave a partition - theoretic proof .
Simplifying an earlier short proof due to Heath - Brown ( who was inspired by Liouville 's idea ) , Zagier presented a one - sentence proof of Fermat 's assertion .