Professor Sawin's Expository Work and Talks

South Pointing Chariot - This is a talk about a marvelous device from ancient China that develops the notion of parallel transport and geodesics as far as Gauss' Theorema Egregium. Prereq: Multivariable Calculus.

Bible Codes - A very elementary introduction to hypiothesis testing and its misuse in science. Prereq: High School Mathematics.

The Hidden Mathematics of Cities and Other Organisms - A look at some pretty mathematics used to model variables connected to the size of cities and the size of organisms. Prereq: Solid High School Mathematics.