In this manuscript, the main aim is to investigate the cylindrically symmetric solutions in a
well known Rastall theory of gravity. For this purpose, we consider the cylindrically …

We present a topologically trivial, non-vacuum solution of the Einstein's field equations in
four dimensions, which is regular everywhere. The metric admits circular closed timelike …

A process for using curvature invariants is applied to evaluate the metrics for the Alcubierre
and the Natário warp drives at a constant velocity. Curvature invariants are independent of …

In this manuscript, we investigate solutions that allow closed time-like curves (CTC s) in
general relativity (GR) within the framework of a modified gravity theory. We consider here …

A cylindrically symmetric and static solution of Einstein's field equations was presented. The
spacetime is conformally flat and regular everywhere except on the symmetry axis where it …

We construct a cylindrical symmetry vacuum solution of the Einstein field equations, regular
everywhere except on the symmetry axis where it possesses a naked curvature singularity …

We present an axisymmetric type N gravitational collapse solution of the Einstein field
equations. The spacetime is regular everywhere except on the symmetry axis, where it …

We present a cylindrically symmetric space-time, representing pure radiation as that of
matter-energy that satisfies the energy conditions. We show that the space-time admits …

We present a stationary axisymmetric space–time admitting circular closed timelike
geodesics everywhere within a finite region of space. The space–time is free from curvature …

We present a gravitational collapse null dust solution of the Einstein field equations. The
space‐time is regular everywhere except on the symmetry axis where it possesses a naked …