# Metric Based on Cosmological Principle: Uniqueness and Implicit Assumptions

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Referee this paper: vixra:1511.0047 by Sudesh Kumar

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The paper proposes a "further generalisation" to the FLRW metric by adding a scale factor to the co-ordinate time, and suggests that this has to do with changing atomic radii.

requested Nov 10, 2015
summarized
paper authored Nov 5, 2015 to flrw
recategorized Nov 10, 2015

Minor comment: the paper conflates "the size of atoms" with a fundamental length scale of sorts. (I've deleted my earlier review, by the way - you're right, I didn't read the paper carefully enough and thought that R was a constant scale factor. Of course, this gives rise to a whole new issue with the metric.)

## 1 Review

+ 1 like - 0 dislike

The metric proposed in the paper obviously doesn't exhibit time-symmetry, since the terms in the metric are dependent on the co-ordinate time, e.g. the time-dilation factor is equal to $1/R(t)$ if we ignore the $d\Sigma$ term. I don't think this is a very elegant result, but nevertheless, I'm curious to know about the energy-momentum distribution that would give rise to this metric.

(I initially wrote this as a comment, but converted it into a review once I figured that the paper does present the metric as something of physical value.)

reviewed Nov 14, 2015 by (1,950 points)
edited Nov 15, 2015

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