Results 261 to 270 of about 23,671 (302)

Energy conditions for Bianchi type I universe in f(G) gravity

Astrophysics and Space Science, 2014
In this paper, we discuss energy conditions in modified Gauss-Bonnet gravity for locally rotationally symmetric Bianchi type I universe model with perfect fluid. The matter contents are constructed to discuss the energy conditions bounds. We take two specific f(G) models along with present day values of Hubble, deceleration, jerk and snap parameters ...
M. Sharif, H. Ismat Fatima
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Perfect fluid Bianchi I model with variable G and Λ

Gravitation and Cosmology, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Bianchi Type I Viscous Universe with Variable G and Λ

General Relativity and Gravitation, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Bulk Viscous Bianchi Type-III Cosmological Model with Time-Dependent G and Λ

International Journal of Theoretical Physics, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Verma, M. K., Ram, Shri
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Bianchi type I cosmological models with variableG and Λ: A comment

General Relativity and Gravitation, 1995
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Kalligas, D., Wesson, P. S., Everitt, C. W. F.   +2 more
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Bianchi type I cosmological models with variableG and A

General Relativity and Gravitation, 1994
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Bianchi Type III Cosmological Models for Barotropic Perfect Fluid Distribution with Variable G and Λ

International Journal of Theoretical Physics, 2010
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Bali, Raj, Tinker, Seema, Singh, Pratibha   +2 more
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Bianchi Type-III Cosmological Models with Gravitational Constant G and the Cosmological Constant Λ

Chinese Physics Letters, 2007
Einstein field equations with variable gravitational and cosmological constants are considered in the presence of perfect fluid for the Bianchi type-III universe by assuming conservation law for the energy-momentum tensor. Exact solutions of the field equations are obtained by using the scalar of expansion proportional to the shear scalar θ ∝ σ, which ...
J. P Singh, R. K Tiwari, Pratibha Shukla
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Bianchi type-I cosmological models with time dependent G and Λ

Astrophysics and Space Science, 2008
Einstein field equations with variable gravitational and cosmological constants are considered in the presence of perfect fluid for Bianchi type-I universe by assuming the cosmological term proportional to the Hubble parameter. This variation law for vacuum density has recently been proposed by Schutzhold on the basis of quantum field estimations in ...
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Perfect fluid bianchi Type-I cosmological models with time varying G and Λ

Pramana, 2008
Bianchi Type-I cosmological models containing perfect fluid with time varying G and Λ have been presented. The solutions obtained represent an expansion scalar θ bearing a constant ratio to the anisotropy in the direction of space-like unit vector λ i .
J. P. Singh, R. K. Tiwari
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