On 12/23/2018 8:22 PM, [email protected] wrote:
On Monday, December 24, 2018 at 3:50:33 AM UTC, Brent wrote: On 12/23/2018 4:47 PM, [email protected] <javascript:> wrote:*If by "flat", you mean mathematically flat, like a plane extending infinitely in all directions, as opposed to asymptotically flat like a huge and expanding sphere, you have to reconcile an infinitesimally tiny universe at the time of the BB, and simultaneously an infinitely large universe extending infinitely in all directions. AG*All that's "infinitesimally tiny" is the visible universe. You must know that the Friedmann equation just defines the dynamics of a scale factor, not a size.*Are you claiming the visible universe at the BB was infinitesimally tiny, but the non visible part was infinitely large (mathematically flat), or huge (asymptotically flat)? AG *
Right. Although we can't be sure whether it is actually flat or just very big.
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