**UM Math Graduate Student Seminar**

Christopher Anderson

* University of Miami *

**will present**

**Arrow's Impossibility Theorem**

Friday, October 2, 2015, 5:00pm

Ungar Building Room 402

**Abstract: **

In this talk, we will offer a proof of Arrow's impossibility theorem, which states that there is no rank order voting system that satisfies certain "fairness" criteria. While Arrow's theorem is popularly interpreted as "there is no perfect voting system," we will also address the limitations of this interpretation of the theorem. We will also see how various common voting systems violate Arrow's theorem.

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