The essential singularity in Einstein's gravity can be avoidable if the preconditions of
Penrose's theorem can be bypassed, ie, if the strong energy condition is broken in the …

We present the state of the art regarding the relation between the physics of Quantum Black
Holes and Noncommutative Geometry. We start with a review of models proposed in the …

Regular (nonsingular) space-times are given that describe the formation of a (locally
defined) black hole from an initial vacuum region, its quiescence as a static region, and its …

The gravitational effects associated with the radiative tail produced by a gravitational
collapse with rotation are investigated. It is shown that the infinite blueshift of the tail's energy …

We investigate the behavior of a noncommutative radiating Schwarzschild black hole. It is
shown that coordinate noncommutativity cures usual problems encountered in the …

The spherically symmetric vacuum stress-energy tensor with one assumption concerning its
specific form generates the exact analytic solution of the Einstein equations which for large r …

We study the quantum gravitational effects in spherically symmetric black hole spacetimes.
The effective quantum spacetime felt by a pointlike test mass is constructed by …

We discuss static spherically symmetric metrics which represent nonsingular black holes in
four-and higher-dimensional spacetime. We impose a set of restrictions, such as a regularity …

Forty years after the discovery of Hawking radiation, its exact nature remains elusive. If
Hawking radiation does not carry any information out from the ever shrinking black hole, it …

This paper shows how the structure and dynamics of a thin shell traveling at the speed of
light can be obtained from a simple and convenient prescription that is a straightforward …