Uniqueness theorem for anti—de Sitter spacetime

Abstract
It is shown that anti—de Sitter spacetime is the unique solution to Rab=Λgab with Λ<0 which is strictly stationary and asymptotically anti—de Sitter. Thus, in the absence of horizons, there are no soliton solutions to Einstein's equation with negative cosmological constant. The analogous statement for de Sitter spacetime (Λ>0) is discussed and some preliminary results are obtained.

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