Abstract
A theorem is proven that the only possible exterior solution for a pseudostationary, rotating, electrovacuum black hole with nondegenerate event horizon is the Kerr-Newman solution withM 2-J2/M2-Q2>0. A special role played in the proof of this theorem by the hidden symmetry groupSU(1, 2) of Einstein's equations is established.
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This essay received the third award from the Gravity Research Foundation for the year 1983 [Ed.].
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Mazur, P.O. Black hole uniqueness from a hidden symmetry of Einstein's gravity. Gen Relat Gravit 16, 211–215 (1984). https://doi.org/10.1007/BF00762536
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DOI: https://doi.org/10.1007/BF00762536