Afoot! Game Theory in Myth and Paradox, American Mathematical Society. Nasar, Sylvia (1998), A Beautiful Mind, Simon & Schuster. Aviad Rubinstein: "Hardness of Approximation Between P and NP", ACM, ISBN 978-1-947487-23-9 (May 2019), DOI: https://doi.org/10.1145/3241304 . # Explains the Nash Equilibrium is a hard problem in computation. External links Complete Proof of Existence of Nash Equilibria Simplified Form and Related Results Game theory equilibrium concepts Fixed points (mathematics) 1951 in economics