2 problems

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Sperhake–Cardoso–Pretorius–Berti–Hinderer–Yunes extremal-Kerr merger conjecture
Consider the merger of two nonspinning black holes, and let an extremal Kerr black hole mean a rotating black hole whose dimensionless spin approaches its maximal allowed value. Sp…
Conjectureopenblack-hole-collisions gravitational-radiation kerr-black-holesarXiv posted 2 days ago
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Pretorius–Khurana irreducible-mass conjecture for grazing black-hole collisions
In grazing collisions of two black holes, let $p$ parameterize initial data, let $p_*$ be the threshold of immediate merger, and let $n$ be the number of orbital revolutions before…
Conjectureopenblack-hole-collisions critical-phenomena gravitational-radiationarXiv posted 2 days ago

Sperhake–Cardoso–Pretorius–Berti–Hinderer–Yunes extremal-Kerr merger conjecture