299 citations · 966 across the 66 of their papers we have counts for
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gr-qc2014★ 8 cited
Irrotational-fluid cosmologies in fourth-order gravity
Amare Abebe, Maye Elmardi
In this paper, we explore classes of irrotational-fluid cosmological models in the context of f(R)-gravity in an attempt to put some theoretical and mathematical restrictions on th…
gr-qc2014★ 18 cited
Breaking the cosmological background degeneracy by two-fluid perturbations in f(R) gravity
Amare Abebe
One of the exact solutions of f(R) theories of gravity in the presence of different forms of matter exactly mimics the LCDM solution of general relativity at the background level.…
gr-qc2014★ 9 cited
Anti-Newtonian cosmologies in f(R) gravity
Amare Abebe
In this paper, we investigate a class of perfect-fluid "anti-Newtonian" cosmological models in the context of f(R) gravity. In particular, we study the integrability conditions of…