“‘There is no such thing as public opinion’: The mathematics of elections, public policy, and slime molds.” Jordan Ellenberg is the John D. MacArthur Professor of Mathematics at the University of Wisconsin-Madison. His research centers on the fields of number theory and algebraic geometry, the parts of mathematics which address fundamental questions about algebraic equations and their solutions in whole number. Reception begins at 3PM, with lecture beginning at 4PM. (UNL Dept. of Mathematics)