Don't cry, Alfred! I need all my courage to die at twenty! Who: Mathematician Evariste Galois Notes: Spoken to his brother Alfred after being fatally wounded in a duel.

On April 6, 1802, Norwegian mathematician Niels Henrik Abel passed away. Abel is well known in mathematics for proving the impossibility of solving the quintic equation by radicals. In parallel to Évariste Galois - who also died young - , he laid the foundations of group theory.