Key points are not available for this paper at this time.
Abstract This article considers the spacetime structure of a charged black hole in the nonlinear Born–Infeld electrodynamics. We discuss a special state of such a black hole in the form of a “black point” with a doubly degenerate horizon, for which the pseudo-Riemannian spacetime has a timelike singularity, and the effective spacetime for photons turns out to be everywhere regular. This property makes extreme black points an intermediate state between traditional and absolutely regular black holes.
В. А. Соколов (Mon,) studied this question.