After its Independence Day Doodle on August 15th, Google's next Doodle is for Pierre de Fermat, the French lawyer and amateur mathematician. De Fermat is famous for scribbling in his copy of the Arithmetica by Diophantus of Alexandria back in 1637, “I have discovered a truly remarkable proof but this margin is too small to contain it”. De Fermat was born on the 17th of August in 1601, making today his 410th birthday. He is famous for not providing proof for his theorems which allowed him to keep his 'amateur' status. He is best known for Fermat's Last Theorem, which is what is depicted in the Google Doodle. This is the theorem that he scribbled in his copy of Arithmetica.
Doodle for a theorem
The Doodle itself features a board with the theorem written out in chalk. The Google logo is 'erased' around the theorem. When you hover your mouse over the Doodle, you'll see the line, “I have discovered a truly marvelous proof of this theorem, which this doodle is too small to contain,” which is of course, a play on his famous line.