$C^2$ Strong Cosmic Censorship conjecture for spherically symmetric collapse

Let the Einstein–Maxwell-charged-scalar-field system be given by equations

$$–$$

, and consider generic, one-ended, asymptotically flat, complete spherically symmetric initial data. Its Maximal Globally Hyperbolic Development is the maximal globally hyperbolic spacetime development of these initial data. $C^2$ Strong Cosmic Censorship conjecture. The Maximal Globally Hyperbolic Development is $C^2$-future-inextendible. This is a formulation of Strong Cosmic Censorship in spherical symmetry: no $C^2$ extension to the future should exist for generic collapse data. The conjecture remains open.