On Saturday, January 18, 2020 at 2:55:16 PM UTC-7, Brent wrote: > > > > On 1/18/2020 1:29 AM, Alan Grayson wrote: > > *the infinite spatial extent must have occurred instantaneously, at the > BB.* > > > It doesn't have to "occur". If the universe is infinite then it didn't > become infinite, it was always (in some timeless way) infinite. The > equations of cosmology are just for a scale factor. We estimate the > parameters from observation and project back to a beginning. So there's > really no sense in projecting back to zero scale factor...there the size of > a flat universe according the equations is infinity*zero. Hopefully a > quantum theory of gravity will replace that oo*0 with something more > sensible. > > Brent >
What do "infinity*zero" and "oo*0" mean? I see your point. My problem is that we seem to have a universe with a BEGINNING, called the BB, and I find it virtually impossible to imagine it starting with an infinite spatial extent. How could "nothing" become infinite in any parameter, suddenly, or due to finite processes? What I can imagine is it emerging from something flat and eternal, having an infinite past. AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/676f0c5e-ec1c-482e-9cdd-1291efdcdf71%40googlegroups.com.
