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Curvature 24 Nov 2008 is a document available to read on EtoBox.
This document discusses the curvature k that appears in the FRW metric for modeling spacetime. It shows that k must have units of 1/m^2 and calculates a value for k given cosmological parameters. For a negatively curved model (k<0), the document embeds the spatial part of the metric in four-dimensional hyperbolic space and calculates distances and circumferences. It finds that for a circle of radius 10 Mly, the ratio of circumference to radius is 0.999999997, demonstrating the small curvature effect. Finall
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