For the universe to be totally flat, and not just asymptotically closer to being flat as the universe expands, wouldn't there have to be pockets of hyperbolically-curved spacetime?(adsbygoogle = window.adsbygoogle || []).push({});

In either case, I still would like to know how one expresses time dilation and length contraction in hyperbolic spacetime. Is it possible in hyperbolic space that the gravitational time dilation factor can be less than one while matter length expands rather contracts due to spacetime curvature?

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# Time dilation and length contraction in hyperbolically-curved spacetime

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