March 24, 1962 - Emile Griffith regained the World Welterweight Championship by knocking out Benny the "Kid" Paret in the 12th round. Paret died ten days later on April 3, 1962 as a result of severe head injuries sustained in the fight.
... Generalizations
The formula and its proof remain correct if the coefficients a, b and c are complex numbers, or more generally members of any field who ...