John von Neumann

Proved the minimax theorem and co-founded game theory.

Biography

A Hungarian-American mathematician who contributed decisively to quantum mechanics, computing architecture, and the mathematical study of strategic interaction. With Oskar Morgenstern he wrote the treatise that established game theory as a field.

Key contributions

• The minimax theorem, establishing that every finite two-player zero-sum game has a well-defined value.
• Co-authorship of Theory of Games and Economic Behavior with Oskar Morgenstern (1944).
• The stored-program computer architecture that bears his name.

Impact

The minimax theorem is what makes minimax search a statement about optimal play rather than mere caution, and it is the result Nash later generalized beyond the zero-sum case.