His theories are used in economics, computing, evolutionary biology, artificial intelligence, accounting, politics and military theory. His life story was the subject of the film “A Beautiful Mind”, with the starring actor Russell Crowe, who played Nash. The film won four Oscars. Nash was associated with Princeton University for many years. On May 19, Nash was in Oslo where he received the Abel Prize, a prestigious international math award. Years ago, he also was awarded the John von Neumann Theory Prize and the Leroy P. Steele Prize.”We are stunned and saddened by news of the untimely passing of John Nash and his wife and great champion, Alicia,” Princeton University President Christopher Eisgruber said in a statement Sunday.