Conformal coordinates of a constant density star
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It is well known that the interior of a constant density spherical star is conformally flat. In this paper we obtain the coordinate system in which the conformal flatness of the metric manifests itself. In a similar way, we also construct such coordinates for Robertson Walker metric.
13 pages. Figure 1 in page 7 and Figure 2 in page 13
13 pages. Figure 1 in page 7 and Figure 2 in page 13