Speaker：Prof. Pin Yu

          Tsinghua University

Title: On the rigidity from infinity for nonlinear Alfven waves

Time：16:30, 24 Sept., 2020

Location：Conference Room 105 at Experiment Building at Haiyun Campus

Abstract:

The Alfven waves are fundamental wave phenomena in magnetized plasmas and the dynamics of Alfven waves are governed by a system of nonlinear partial differential equations called the MHD system. In the talk, we will focus on the rigidity aspects of the scattering problem for the MHD equations: We prove that the Alfven waves must vanish if their scattering fields vanish at infinities. The proof is based on a careful study of the null structure and a family of weighted energy estimates. This is based on the joint work with Mengni Li.