English physicist whose calculations predicted that particles should exist with negative energies. This led him to
suggest that the electron 
had an "antiparticle. " This antielectron was
discovered subsequently by Carl Anderson in 1932, and came to be called the
positron. Dirac also developed a tensor 
version of the Schrödinger
equation, known as the Dirac equation, which is relativistically correct.
For his work on antiparticles and wave mechanics, he received the Nobel Prize in physics in
1933.
Dirac, P. A. M. General Theory of Relativity. Princeton, NJ: Princeton University Press, 1996.
Dirac, P. A. M. History of Twentieth Century Physics.
Dirac, P. A. M. Quantum Mechanics, 4th ed. London: Oxford University Press, 1958.
Kragh, H. Dirac: A Scientific Biography. Cambridge, England: Cambridge University Press, 1990.
Kragh, H. "Dirac." Sci. Amer., 104-109, May 1993.
Kursunoglu, B. and Wigner, E. P. (Eds.). Reminiscences about a Great Physicist: Paul Adrien Maurice Dirac.
Cambridge: Cambridge University Press, 1987.
