One question was how a black hole can grow, if approaching objects take infinite time to enter the black hole, as seen from far away ?
I haven't studied the math on this, but I believe it's a test particle, with negligible mass, that is never seen to enter the black hole.
My intuition tells me...
How do you conclude that ? The infinite set of of universes would have a certain cardinality determined by it's nature. This cardinality may, or may not, be high enough to accommodate all possilble universes.
The nature of the set of parallel universes is presumably determined by physical...
I don't know, that's a mathematics question. My guess is that cardinalities are countably infinite. Given a set of a certain cardinality, it seems plausible that a set with higher cardinality can be constructed.
Cardinality is a property of infinite sets. For example, the infinite set of integers have a lower cardinality than the infinite set of real numbers. This is easy to understand, because there is a real number for every integer, but there is also an infinite set of real numbers between every...
Contrary to popular belief, it's sometimes possible to prove the negative. Some things are logical impossibilities and we therefore know that they can't exist. For example, there are no round squares.
My question is if it might be a mathematical impossibility that all possible universes...
I'm just watching a program called "The Universe - Parallell Universes". They keep insisting that every possibility is realized in some universe. For example, there would be universes where George W. Bush never became president.
However, it seems to me that that assumes that the number of...