John Forbes Nash, Jr. (born June 13, 1928) is an American mathematician whose works in game theory, differential geometry, and partial differential equations have provided insight into the forces that govern chance and events inside complex systems in daily life. His theories are used in market economics, computing, evolutionary biology, artificial intelligence, accounting, politics and military theory. Serving as a Senior Research Mathematician at Princeton University during the latter part of his life, he shared the 1994 Nobel Memorial Prize in Economic Sciences with game theorists Reinhard Selten and John Harsanyi.
1.) Sylvia Nasar (1999). A Beautiful Mind: A Biography of John Forbes Nash, Jr., Winner of the Nobel Prize in Economics, 1994. Simon and Schuster. ISBN 9780684853703. "Nash, by then an atheist, balked at a Catholic ceremony. He would have been happy to get married in city hall."
2.) Sylvia Nasar (2011). "Chapter 17: Bad Boys". A Beautiful Mind. Simon and Schuster. p. 143. ISBN 9781439126493. "In this circle, Nash learned to make a virtue of necessity, styling himself self-consciously as a "free thinker." He announced that he was an atheist."