Math Colloquium: Ehrhart Theory and Partial Permutohedra

Presented by Dr. Erik Insko, Professor of Mathematics, Iowa State University. In this talk, I will give a brief introduction to Ehrhart polynomials, which count the number of lattice points in a convex lattice polytope and also describe the polytope’s …

Math Colloquium: Spectral Faux Trees and Coalescing Sets

Presented by Dr. Steve Butler, Professor of Mathematics, Iowa State University. A classic problem in mathematics is “Can you hear the shape of a drum?” In graph theory, this is often phrased in terms of the eigenvalues of matrices associated …