On 3/19/2025 10:09 PM, Alan Grayson wrote:
On Wednesday, March 19, 2025 at 10:50:41 PM UTC-6 Brent Meeker wrote: On 3/19/2025 9:14 PM, Alan Grayson wrote:On Wednesday, March 19, 2025 at 3:28:40 PM UTC-6 Brent Meeker wrote: On 3/19/2025 4:56 AM, Alan Grayson wrote:On Wednesday, March 19, 2025 at 5:40:48 AM UTC-6 John Clark wrote: On Wed, Mar 19, 2025 at 4:30 AM Alan Grayson <[email protected]> wrote: /> If the universe is infinite in spatial extent, and we run the clock backward, is all the mass/energy of the observable region confined to a tiny or zero volume?/ *The short answer is nobody knows what will happen if you run the clock back to zero, and the mystery remains regardless of if the universe is finite or infinite. Nobody knows what will happen when things get super small because our two best physical theories, Quantum Mechanics and General Relativity, disagree with each other. Most believe that something will prevent a zero volume from ever occurring, but nobody knows what that "something" is. * * * ***John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* Maybe it's a 5th force. What I'd like to know is this; assuming an infinite spatial universe and that it gets very very small as we run the clock backward, the observable regions shrinks, but what happens to the unobservable region? Quentin claimed to have an answer, but I can't recall what it was. AGAll theories treat the unobservable regions as being similar to the observable (what else could you justify?). So every finite region, observable or not shrinks to zero. Brent *But if every finite subset of an infinite set strinks to zero, in the case the assumed infinite set is the spatial extent of the universe, won't the infinite spatial set of the universe also shrink to zero (which is what Quentin denies)? AG**No. Brent* But, as I've shown, this contradicts basic set theory. AG
Basic set theory has no metric. Shrink to zero in meaningless for a set. Brent -- 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 visit https://groups.google.com/d/msgid/everything-list/ade5cbcf-bc92-4b72-8f40-fcaeef214137%40gmail.com.
