The first isogonic center of a triangle, which for an acute triangle is the interior point that minimizes the sum of the distances to the vertices, is known as his point.  
The first isogonic center of a triangle, which for an acute triangle is the interior point that minimizes the sum of the distances to the vertices, is known as his point.  He proved that an odd prime can be uniquely expressed as the difference of two squares, and also that the sum of two squares cannot be equal to 3 modulo 4.  The latter statement was a claim of Diophantus, which this man proved in preparing an edition of Diophantus' work.  More famous are his claim that "a to the p minus 1 is equal to 1 mod p," known as his "little theorem."  FTP, name this French mathematician whose most famous conjecture was proven by Andrew Wiles.
The first isogonic center of a triangle, which for an acute triangle is the interior point that minimizes the sum of the distances to the vertices, is known as his point.  
Pierre de Fermat