Recent cosmological observations suggest the existence of a positive cosmological constant
Λ with the magnitude Λ (Gℏ/c3)≈ 10− 123. This review discusses several aspects of the …

General relativity does not allow one to specify the topology of space, leaving the possibility
that space is multi-rather than simply-connected. We review the main mathematical …

In this paper, we study the deflection angle for wormhole-like static aether solution by using
Gibbons and Werner technique in non-plasma, plasma, and dark matter mediums. For this …

The f (T) theory, which is an extension of teleparallel, or torsion scalar T, gravity, is recently
proposed to explain the present cosmic accelerating expansion with no need of dark energy …

Abstract “Alternative gravitational theories” based on Lagrangian densities that depend in a
nonlinear way on the Ricci tensor of a metric are considered. It is shown that, provided …

Most of the energy in the Universe consists of some form of dark energy that is gravitationally
self-repulsive and that is causing the expansion of the Universe to accelerate. The possible …

In this article, the energy–momentum distributions associated with a topologically trivial
Gödel-type space–time, using different complexes of Møller, Einstein, Landau–Lifshitz …

Recently f (T) theories based on modifications of teleparallel gravity, where torsion is the
geometric object describing gravity instead of curvature, have been proposed to explain the …

We consider the Noether symmetry approach to find exact cosmological solutions in f (T)-
gravity. Instead of taking into account phenomenological models, we apply the Noether …

The demand to obtain answers to highly complex problems within strong-field gravity has
been met with significant progress in the numerical solution of Einstein's equations—along …