Recorded 27 October 2021. Cécile Huneau of the Ecole Polytechnique presents "Global existence for a system of wave equations on a product space" at IPAM's Workshop II: Mathematical and Numerical Aspects of Gravitation. Abstract: In this talk, I will present a work with Annalaura Stingo (Davis--Polytechnique) where we study a system of quasilinear wave equations on the product of the Euclidean space with a one dimensional torus. This system is a toy model for Einstein equations with additional compact directions, present in Kaluza-Klein theory. Learn more online at: https://www.ipam.ucla.edu/programs/workshops/workshop-ii-mathematical-and-numerical-aspects-of-gravitation/?tab=schedule