Orateur: Fabien Friedli
Titre: Heat knows about quadratic reciprocity, sums of squares and much more.

Résumé: In this talk I will try to explain how we can deduce beautiful and classical results in number theory from one single formula, namely the Poisson-Jacobi theta inversion formula. I will focus on Gauss quadratic reciprocity law and on sums of squares, but if time allows, I will also say a few words about Riemann zeta function.