American mathematician (1928-2015) who made fundamental contributions to game theory, differential geometry, and the study of partial differential equations; he is the only person to be awarded both the Nobel Memorial Prize in Economic Sciences and the Abel Prize. Nash's struggles with paranoid schizophrenia became the basis for Sylvia Nasar's biography, A Beautiful Mind, which was later adapted into an Oscar-winning movie. Glossy 5 x 7 close-up photo of Dr. Nash, signed on reverse in blue ballpoint, "John F. Nash, Jr." In fine condition.
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