Fixed-point theorems with applications to game theory

Abstract

Nash's Theorem is an important game-theoretic result following from the fixed-point theorem of Kakutani, which is itself a generalization of Brouwer's Fixed-Point Theorem. This paper will present a detailed proof of Brouwer's Theorem, as well as an overview of the concepts of homology, homotopy, and degree which are necessary to the proof. Also included are discussion and less-detailed proofs of Kakutani's and Nash's theorems.