# Naked singularities and mass distribution of a black hole

Do naked singularities also appear mathematically if the mass of a black hole is uniformly spread around its Schwarzschild surface?

I recently heard about the concept of a naked singularity and it made me raise an eyebrow. I know near to nothing to about the mathematics behind General relativity. However, I do know that mass can not move faster than the speed of light so, if mass would actually have to rotate around in the Schwarzschild sphere of the black hole, that would put a "nice" mathematical limitation on the maximal rotation of a black hole.

It's probably already thought of, but hey who knows, perhaps it might actually be interesting to look at.

• The movement of particles outside the black hole, and the fact that in a local inertial reference frame they cannot move faster than $c$, has nothing at all to do with the spin of the black hole itself. Classical black holes can spin as fast as they want, but past a certain angular momentum they lose their event horizon, expose a naked singularity, and are no longer proper black holes. In a quantum theory, most physicists assume this either won’t happen or won’t matter because the singularity will no longer be a singularity. Jan 13 '19 at 23:23