An Interesting property of the Friedman Universes

TL;DR

This paper demonstrates that Friedman universes can be generated from flat Minkowski spacetime through specific conformal rescaling of the metric, revealing a novel geometric property.

Contribution

It introduces a new method of deriving Friedman universes from Minkowski spacetime via conformal transformations, highlighting a previously unnoticed property.

Findings

Friedman universes can be obtained from Minkowski spacetime

Conformal rescaling is a key technique for this transformation

The property links flat and curved cosmological models

Abstract

We show in the paper that Friedman universes can be created from empty, flat Minkowski spacetime by using suitable conformal rescaling of the spacetime metric.