124 citations · 418 across the 27 of their papers we have counts for
4 papers · 1 filter
A stable flat entropy-corrected FRW universe
Nasr Ahmed, Sultan Z. Alamri
In this paper, a general entropy-corrected FRW cosmological model has been presented in which a deceleration-to-acceleration transition occurs according to recent observations. We…
Space-time singularities and the theory of retracts
Nasr Ahmed, H. Rafat
In previous publications, we have started investigating some possible applications to the retraction theory in gravitational physics and showed that it can be very useful in provid…
On the existence of deformations and dimensional reduction in wormholes and black holes
Nasr Ahmed, H. Rafat
The deformation retract is, by definition, a homotopy between a retraction and the identity map. We show that applying this topological concept to Ricci-flat wormholes/black holes…
A stable flat universe with variable Cosmological constant in f(R,T) Gravity
Nasr Ahmed, Sultan Z. Alamri
In this paper, a general FRW cosmological model has been constructed in gravity reconstruction with variable cosmological constant. A number of solutions to the field equa…