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If I recall correctly, the "universe" is a concept meant to encompass all that exists. How then can there be multiple universes? Wouldn't the set of all univers
by river_styx 18y ago
If I recall correctly, the "universe" is a concept meant to encompass all that exists. How then can there be multiple universes? Wouldn't the set of all universes itself exist within the universe?
It seems more likely to me that "universe" here is being defined as "what we can observe", in which case these multiverses are simply the unobservable part of our universe.
- r7000 18y ago"Universes" in this context means discrete space-times with potentially different physical constants where the laws of physics would be different. http://en.wikipedia.org/wiki/Multiverse#Bubble_theory http://en.wikipedia.org/wiki/Multiverse#Bubble_theory The Many-Worlds hypothesis also implies separate "realities" ("universes"?) diverge with every quantum measurement. The word is used for convenience.
- river_styx 18y agoI guess that's part of my objection, really. The use of the word "universe" implies that there is only one of them, as the prefix "uni-" in Latin means "one".
- lehmannro 18y agoBack in the day "atoms" were meant to be indivisible as well. It's just relics of our language not keeping up with science.