231 citations
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15 papers · 1 filter
Gravitational Energy in Van Stockum Space-Time
Ragab M Gad, H. A. Alharbi
The purpose of this paper is to illustrate the problem of energy and momentum distributions of Van Stockum space-time within the framework of two different theories of gravity, gen…
On Axially Symmetric Space-Times Admitting Homothetic Vector Fields in Lyra's Geometry
Ragab M. Gad, A. E. Al Mazrooei
This paper investigates axially symmetric space-times that admit a homothetic vector field based on Lyra's geometry. The cases when the displacement vector is a function of and…
Homothetic Motion in a Bianchi Type-I Model in Lyra Geometry
Ragab M. Gad
In this paper we study a homothetic vector field of a Bianchi type-I model based on Lyra geometry. The cases when a displacement vector is function of and when it is constant a…
Axially Symmetric Cosmological Mesonic Stiff Fluid Models in Lyra's Geometry
Ragab M. Gad
In this paper, we obtained a new class of axially symmetric cosmological mesonic stiff fluid models in the context of Lyra's geometry. Expressions for the energy, pressure and the…
Møller's Energy in the Kantowski-Sachs Space-time
M. Abdel-Megied, Ragab M. Gad
We present a counter example to paper \cite{P71} and show that the result obtained is correct for a class of metric but not general. We calculate the total energy of the Kantowski-…
Energy and Momentum Distributions of Kantowski and Sachs Space-time
Ragab M. Gad, A. Fouad
We use the Einstein, Bergmann-Thomson, Landau-Lifshitz and Papapetrou energy-momentum complexes to calculate the energy and momentum distributions of Kantowski and Sachs space-time…