Speaker: Researcher Xiao Zhang（Academy of Mathematics and Systems Sciences, Chinese Academy of Sciences）

Title: Some mathematical problems in gravitational waves

Time: Fri, Jun.7, 2019, PM:17:00-18:00

Location: Room 4318, Building No.4, Wushan Campus

Abstract:

        The nonlinear effects of gravitational waves are described by Bondi-Sachs spacetimes. In the case of zero cosmological constant, they were originally introduced by Bondi for axi-symmetric spacetimes, and generalized by Sachs to general asymptotically flat spacetimes over 50 years ago. Bondi also defined the Bondi energy-momentum at null infinity, which represents the rest energy of spacetimes after the loss due to gravitational radiation.

        In this talk, we shall discuss some basic problems about the Bondi energy-momentum as well as some relevant PDE problems.