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Search name	Searched On	Run search
Keyword: Cathode Power (1)	31 Mar 2025	Run
Keyword: Urbach Energy (7)	31 Mar 2025	Run
Keyword: Dust Universe (1)	31 Mar 2025	Run
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Keyword: Planar Curves (3)	31 Mar 2025	Run

articleNo Access
Irrotational-fluid cosmologies in fourth-order gravity
- Amare Abebe and
- Maye Elmardi
International Journal of Geometric Methods in Modern Physics25 Oct 2015
Preview Abstract
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 the form of the f(R) gravitational Lagrangian. In particular, we investigate the consistency of linearized dust models for shear-free cases as well as in the limiting cases when either the gravito-magnetic or gravito-elecric components of the Weyl tensor vanish. We also discuss the existence and consistency of classes of non-expanding irrotational spacetimes in f(R)-gravity.

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