Question:  What American mathematician who made fundamental contributions to game theory, differential geometry, and the study of partial differential equations, had a film based on his the life called, A Beautiful Mind?
Sentence (from "A Beautiful Mind (film)"): The film stars Russell Crowe, along with Ed Harris, Jennifer Connelly, Paul Bettany, Adam Goldberg, Judd Hirsch, Josh Lucas, Anthony Rapp, and Christopher Plummer in supporting roles.
Relevant evidence: No