AbstractI shall start by presenting the Einstein-Yang-Mils system and by writing it in the Lorenz gaugeand in wave coordinates as a coupled system of non-linear hyperbolic partial differential equationsand l will then show how one constructs the initial data for a Cauchy hyperbolic formulation of theproblem, Thereafter, l will present the idea behind the proof of the non-inear stability of theM...
AbstractKerr-de Sitter spacetimes is a family of slowly rotating black holes with positive cosmological constant. They are parameterized by their mass and angular momentum. We discuss propagation of singularities of wave equations on Kerr-de Sitter spacetimes. We construct a new pseudodifferential operator algebra using blow up and prove a propagation estimate improving the result of Hintz. The...