When does a majority exist? How does the geometry of the political spectrum influence the outcome? What does mathematics have to say about how people behave? When mathematical objects have a social interpretation, the associated theorems have social applications. We give examples of situations where sets model preferences, and prove extensions of classical theorems on convex sets that can be used in the analysis of voting in "agreeable" societies. This talk also features research with undergraduates.
 
Come and enjoy our Math Seminar for Undergraduates! Professor Su is an excellent speaker. He has won a prize for expository writing, the 2004 Henry L. Alder Award for distinguished teaching, and he was the 2006 James R.C. Leitzel Lecturer. 
 
Pizza and beverages will be provided.