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Figure 4: This figure shows a view of the numerically-computed event horizon in a single slice, together with the locus of the event horizon’s generators that have not yet joined the event horizon in this slice, for a head-on binary black hole collision. Notice how the event horizon is non-differentiable at the cusp where the new generators join it. Figure reprinted with permission from [103]. © 1996 by the American Physical Society. |