From matrix mechanics and wave mechanics to unified quantum mechanics
pp. 276-293
in: Jagdish Mehra (ed), The physicist's conception of nature, Berlin, Springer, 1973Abstract
The story I want to tell you begins in March 1926 and ends in April 1926. Early in March two separate theories existed: matrix mechanics and wave mechanics. At the end of April these two had merged into one theory, more powerful than the two parents taken separately.