We provide two new, simple proofs of Afriat's celebrated theorem stating that a finite set of price-quantity observations is consistent with utility maximization if, and only if, the observations satisfy a variation of the Strong Axiom of Revealed Preference known as the Generalized Axiom of...

I Brouwer’s Theorem -- II Some Applications of Brouwer’s Theorem -- III Triangulations -- IV Algorithms to Find Completely-Labelled Simplices -- V Extensions of Brouwer’s Theorem -- VI Applications of Kakutani’s Theorem and its Extensions -- VII Eaves’ First Algorithm -- VIII...