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 4 x 6 photo of Nash in a calm seated pose, signed in the lower border in black ballpoint, "John F. Nash, Jr." In fine condition.
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