question: What did von Neumann prove with his model of expanding economy ?
answer: uniqueness of an equilibrium using his generalization of the Brouwer fixed-point theorem
turker_answer: Von Neumann proved uniqueness of an equilibrium using his generalization of the Brouwer fixed-point theorem with his model of expanding economy .
rule-based: Von Neumann proved uniqueness of an equilibrium using his generalization of the Brouwer fixed-point theorem with his model of expanding economy .