Penn Arts & Sciences Logo

Rademacher Lectures

Monday, March 12, 2018 - 3:30pm

Jacob Lurie

Harvard University


University of Pennsylvania


Tea will be served at 3:00pm in 4E17 DRL.

Let L be a positive definite lattice. There are only finitely many positive definite lattices L' which are isomorphic to L modulo N for every N > 0: in fact, there is a formula for the number of such lattices, called the Siegel mass formula. In this talk, I'll review the Siegel mass formula and explain Weil's reformulation of it in terms of the volume of adelic groups.

Stream Video URL

Download Video URL