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Equation of state and singularities in FLRW cosmological models
FLRW cosmological models Friedmann equations
2010/3/18
We consider FLRW cosmological models with standard Friedmann equations, but leaving free the equation of state. We assume that the dark energy content of the universe is encoded in an equation of stat...
Implications of a Decay Law for the Cosmological Constant in Higher Dimensional Cosmology and Cosmological Wormholes
Extra-dimensions Dark energy Phantom energy Superacceleration Λ− decaying cosmology Big bounce
2010/7/8
Implications of a Decay Law for the Cosmological Constant in Higher Dimensional Cosmology and Cosmological Wormholes.
An Open Singularity-Free Cosmological Model with Inflation
Open Singularity-Free Cosmological Inflation open universe
2010/4/13
In the light of recent observations which point to an open universe (W 0 < 1), we reconsider singularity-free models, originally constructed for closed universes. Our model starts from a nonsingular s...
Some String Cosmological Models in Cylindrically Symmetric Inhomogeneous Universe
String Cosmological Models
2010/4/15
The aim of this paper is to investigate the behavior of a string in the cylindrically symmetric inhomogeneous cosmological model. It has been assumed that expansion q in the model is proportional to s...