Conformal infinity in Robinson-Trautman spacetimes with cosmological   constant
  In past, the future asymptotic behavior (with respect to initial data on null hypersurface) of Robinson-Trautman spacetime was examined and its past horizon characterized. Therefore, only the investigation of conformal infinity is missing from the picture. We would like to present some initial results concerning conformal infinity when negative cosmological constant is present motivated by the AdS/CFT correspondence. 
Otakar Svitek
gr-qc hep-th