Catherine Pfaff of Queen's University will deliver the final colloquium of the semester, titled "Symmetries, Groups & How They Interact."
Abstract: "The symmetries of a polygon form a group. This group acts on the polygon by rotating it and flipping it. This basic idea of studying a group as symmetries of an object extends far beyond polygons. Through a myriad of colorful pictures, I will introduce the notion of a group, some of my favorite examples and then examples of the interplay between these groups and various geometric objects. No advanced mathematical knowledge will be assumed, and of course we will also play with doughnuts!"
Refreshments will be served at 4 p.m. in Seeley Mudd 208.