The discoverer of this expression overcame a major roadblock by disproving an earlier conjecture about the uniqueness of NUT space.
The discoverer of this expression overcame a major roadblock by disproving an earlier conjecture about the uniqueness of NUT space. Its discoverer later extended some properties of this expression, which is Petrov type D, to general algebraically special solutions along with Alfred Schild. The corresponding principal null vectors for this expression can be combined to form a Killing tensor which yields Carter's constant when it operates twice on the four-velocity. A sine-squared term in this expression leads to the prediction of a region in which all timelike paths point in the (*) azimuthal direction, implying a finite lower bound on angular velocity there. All but one of the off-diagonal elements of this metric can be eliminated by switching to Boyer-Lindquist coordinates. It was extended for the case where charge is present by Ezra Newman, and as angular momentum approaches zero it reduces to the Schwarzschild metric. For 10 points, name this metric which describes the geometry around a rotating black hole.
The discoverer of this expression overcame a major roadblock by disproving an earlier conjecture about the uniqueness of NUT space.
Kerr metric [prompt on Kerr-Newman metric before "Newman"]