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Forget the Big Bang: Gravitational waves may have really created the Universe
(www.sciencedaily.com)
this post was submitted on 01 Aug 2025
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There's nothing handwavy about renormalization, it's just a way of describing the mathematics which is easier for a human brain to deal with, so we've standardised on it.
An unnormalised wave function can show you the relative probability of any given thing, but it makes like easier if you set the scale so that you can read an actual probably straight off it, rather than having to ask "relative to what?"