Speaker
Wojciech Kaminski
(University of Warsaw)
Description
Powers of Laplacians are weakly hyperbolic in the Lorentzian signature, which is not enough for well posed Cauchy problem. However, the conformal GJMS operators have better properties due to their construction via the ambient metric. Similar properties are shared by the obstruction tensor in the harmonic gauge. This fact can be used to prove stability of asymptotically de Sitter spaces (a method proposed by Anderson and Chrusciel).
Primary author
Wojciech Kaminski
(University of Warsaw)
