Asymptotics with a cosmological constant: The solution space

@inproceedings{Mao2019AsymptoticsWA,
  title={Asymptotics with a cosmological constant: The solution space},
  author={Pujian Mao},
  year={2019}
}
In this work, the solution space in Newman-Penrose formalism with a cosmological constant is derived. The residual gauge transformation preserving the solution space is also worked out. By turning off the cosmological constant, the solution space has a well-defined flat limit. The asymptotic symmetry group of the resulting solution space consists of Diff($S^2$) transformations and supertranslations. 
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