MAT 1839 Optimal Transportation, Dynamics, and Ricci Curvature Sept 11, 2008 http://www.math.toronto.edu/mccann/1839.html Prof. Robert McCann www.math.toronto.edu/mccann BA 6124 (416) 978-4658 Lectures: Thursday 4:10 - 5:30 PM BA 6183 (except Oct 30-31) Friday 4:10 - 5:30 PM BA 6183 Office Hours: Friday 3:10 - 4:00 PM BA 6124 This course is an introduction to the active research areas surrounding optimal transportation and its deep connections to problems in dynamical systems, geometry, physics, and nonlinear partial differential equations. The basic problem is to find the most efficient structure linking two continuous distributions of mass --- think of pairing a cloud of electrons with a cloud of positrons so as to minimize average distance to annihilation. Applications include existence, uniqueness, and regularity of surfaces with prescribed Gauss curvature (the underlying PDE is Monge-Ampère), geometric inequalities with sharp constants, periodic orbits for dynamical systems, long time asymptotics in kinetic theory and nonlinear diffusion, and the geometry of fluid motion (Euler's equation and approximations appropriate to atmospheric, oceanic, damped and porous medium flows). The course builds on a background in analysis, including measure theory, but will develop elements as needed from the calculus of variations, game theory, convexity, elliptic regularity, dynamical systems and fluid mechanics, not to mention physics, economics, and geometry. Depending on interest and preparation of the students, we will go more or less deeply into certain aspects of the theory, such as geometry and geometric evolution equations including Ricci flow, the question of when the solution to a fully nonlinear degenerate elliptic equation is smooth, or into applications such as atmospheric and economic modelling. ----------------------------------------------------------------------------- Text: Cedric Villani "Topics in Optimal Transportation" Providence: AMS 2003 GSM/58 ISBN 0-8218-3312-X See also further sources periodically linked to the course webpage above. ----------------------------------------------------------------------------- Grading Scheme: Attendance and participation 20 % Written Project 50 % Oral presentation 30 % INDEPENDENT PROJECT DEADLINES Settle on a topic: Friday, Oct. 10 Written report: Thursday, Nov. 20 This project is intended to provide you with an opportunity to independently pursue some topic of interest to you within the framework of the course. Those taking this course for credit will be expected to prepare a written report on your topic (something on the order of 6-12 pages), and give a presentation on the same topic in the second half of the semester. One possibility is to choose a paper of interest to you, study it, and write a summary explaining its interest, importance and key contributions. Chapter 10 of Villani contains suggests many possible topics in this vein, and I am happy to discuss others with you. My webpage and the course webpage are other resources. In any case you should settle on a topic and format in consultation with me by Oct. 10.