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 blue ballpoint, "John F. Nash, Jr.," who also signs on the reverse. In fine condition, with light surface impressions from the signature on the back.Format: Signed Photo