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Penrose diagram of an extremal charged (Reissner-Nordström) black hole
An extremal black hole is one which has the maximum possible charge, or the maximum possible spin. In this case the inner and outer horizons coincide. |
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Penrose diagram of an extremal charged (Reissner-Nordström) black hole
An extremal black hole is one which has the maximum possible charge, or the maximum possible spin. In this case the inner and outer horizons coincide. |
Penrose diagram of a black hole with imaginary charge