John F. Nash

John F. Nash was an influential American mathematician known for his groundbreaking work in game theory, which studies strategic decision-making among individuals or groups. His most famous contribution is the concept of the Nash Equilibrium, where each participant's strategy is optimal, given the strategies of others. This idea has applications in economics, biology, and social sciences. Nash's life was marked by personal challenges, including a battle with mental illness, which he overcame to win the Nobel Prize in Economic Sciences in 1994. His story was also portrayed in the film "A Beautiful Mind."