I was reading about the first few Planck seconds and noticed no mention of general relativity other than the horizon problem. I some googling and only came up with some 1979 research that took the assumption that gravity was less powerful in the past, which I find suspect and Was developed before inflation was figured out. So what is the modern idea of the geometry of space near the beginning of time? Is there any direct evidence of anything or would it be purely mathematical conjecture which we know can't reconcile GR and QM at those scales. As inflation pushed faster than light, would the uncurving of the universe as the energy spread out responsible for the primordial gravity waves that I've heard about but don't really understand?(adsbygoogle = window.adsbygoogle || []).push({});

Related GR question, if you have tightly curved space because of ultra high densities then greatly expanded the space, how long would it take for it to flatten? Does space instantly transform to the energy density changes or does it take time. (I don't mean propogate which I know happens at c.). If the curvature is X because of x energy and instantly there is x-y energy, is the curvature X-Y or will it be somewhere in between because curve changes gradually?

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# B What was the curvature of the early universe?

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