Wednesday, September 22, 2021. Mathematics Colloquium. Dr. Brandon Hanson, Department of Mathematics & Statistics, University of Maine. “Sums and products and combinatorial geometry (oh my!)” 3:15 – 4:15 pm, Hill Auditorium, Barrows Hall (with refreshments at 3:00 pm) Abstract: One of the fundamental themes in number theory is the incompatibility of addition and multiplication. As he