Alex Lubotzky of the Einstein Institute of Mathematics has been invited as the Spring 2014 Zassenhaus Lecturer. He will present his lectures on High Dimensional Expanders on January 27, at 4:30 in University Hall 0014 and January 28 and January 29 in Cockins Hall 240 at 4:30. There will be refreshments served each day at 3:30 in Math Tower 724.