Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2001-06-07
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX, 3 pages
Scientific paper
This is just to point out that the Nariai metric is the first example of the
singularity free expanding perfect fluid cosmological model satisfying the weak
energy condition, $\rho>0, \rho+p=0$. It is a conformally non-flat Einstein
space.
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