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 construct several charged regular black hole metrics employing mass distribution
functions which are inspired by continuous probability distributions. Some of these metrics …

We drop the complexification procedure from the Newman-Janis algorithm and introduce
more physical arguments and symmetry properties, and we show how one can generate …

In this article, we present a detailed model of anisotropic quintessence stars in the
hypothesis of f (R, ϕ, X) gravity, where R is the Ricci scalar, ϕ represents the potential scalar …

This paper investigates the behavior of charged compact stars in the modified f (R, ϕ) theory
of gravity, where R and ϕ denote the Ricci scalar and scalar field respectively. The modified …

It is believed that curvature singularities are a creation of general relativity and, hence, in the
absence of a quantum gravity, models of nonsingular black holes have received significant …

This work aims to study a charged compact star in the scenario of f (R) theory of gravity. We
use some matching condition of spherically symmetric space-time with Bardeen's model as …

In this paper, we study the viability and stability of anisotropic compact stars in the context of
f (Q) theory, where Q is non-metricity scalar. We use Finch–Skea solutions to investigate the …

The spacetime singularities in classical general relativity are inevitable, as predicated by the
celebrated singularity theorems. However, it is a general belief that singularities do not exist …

We apply the classical double-copy procedure to a class of regular, nonsingular black hole
solutions. We give several examples, paying particular attention to a string-theory-corrected …