Results 21 to 30 of about 1,585,030 (297)
Axistationary perfect fluids - a tetrad approach [PDF]
Classical and Quantum Gravity, 1999 12 ...
Fodor, Gyula +2 more
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Homothetic perfect fluid spacetimes [PDF]
Classical and Quantum Gravity, 1997 A brief summary of results on homotheties in General Relativity is given, including general information about space-times admitting an r-parameter group of homothetic transformations for r>2, as well as some specific results on perfect fluids. Attention is then focussed on inhomogeneous models, in particular on those with a homothetic group $H_4 ...
Carot, J., Sintes, A. M.
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Geometry of static perfect fluid space-time [PDF]
, 2023 In this article, we investigate the geometry of static perfect fluid space-time on compact manifolds with boundary. We use the generalized Reilly's formula to establish a geometric inequality for a static perfect fluid space-time involving the area of ...
Costa, Johnatan +3 more
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A Non-Polynomial Gravity Formulation for Loop Quantum Cosmology Bounce
Galaxies, 2017 Recently the so-called mimetic gravity approach has been used to obtain corrections to the Friedmann equation of General Relativity similar to the ones present in loop quantum cosmology.
Stefano Chinaglia +2 more
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Results in Physics, 2021 Static perfect fluid spaces are of great interest in metric theories of gravitation, they being used in building realistic models of some compact objects, like neutron stars and white dwarfs.
Sharief Deshmukh +2 more
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Conformally Flat Pseudoprojective Symmetric Spacetimes in fR,G Gravity
Advances in Mathematical Physics, 2022 Sufficient conditions on a pseudoprojective symmetric spacetime PPSn whose Ricci tensor is of Codazzi type to be either a perfect fluid or Einstein spacetime are given.
Uday Chand De +3 more
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On a perfect fluid Kahler spacetime [PDF]
, 2016 The object of the present paper is to study a perfect fluid K¨ahlerspacetime. A perfect fluid K¨ahler spacetime satisfying the Einstein field equation with a cosmological term has been studied and the existence of killingand conformal killing vectors ...
PANDEY, P. N., SRIVASTAVA, VIBHA
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Mathematical Formalism in Cosmological Models of Gravity
Semina: Ciências Exatas e Tecnológicas, 2016 We analyze solutions to Friedmann-Robertson-Walker cosmologies in Brans-Dicke theory, where a scalar field is coupled to gravity. The cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant ...
Artigo Retratado
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Mathematics, 2022 Sufficient conditions for a Lorentzian generalized quasi-Einstein manifold M,g,f,μ to be a generalized Robertson–Walker spacetime with Einstein fibers are derived. The Ricci tensor in this case gains the perfect fluid form.
Sameh Shenawy +3 more
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Physics Letters B, 2010 7 pages, 5 figures, To appear in Phys. Lett. B (2010)
Rahaman, F. +4 more
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