Highly relativistic solutions of the Einstein-Vlasov system and a comparison to solutions of the Einstein-Dirac system

In the first part of this talk Prof. Hakan Andreasson (Department of Mathematical Sciences, Chalmers University of Technology, University of Gothenburg, Sweden) will review some results on highly compact stationary solutions of the Einstein-Vlasov system. A comparison to Wheeler’s idealized spherically symmetric geons will be made which indicates that solutions of the massless EV system have very similar properties. In the second part he will focus on a comparison between solutions of the Einstein-Dirac system and the EV system.