If I’m reading that paper correctly, it is talking about information content. That’s a distinct issue from simulating the universe which requires processing in a subset. It might be possible for someone to write down a complete mathematical description of the universe (i.e. initial conditions and then a time parameter from that point describing its subsequent evolution) but that doesn’t mean one can actually compute useful things about it.
That may not be a problem if the universe contains almost no information. In that case the universe could Quine itself… sort of.
If I’m reading that paper correctly, it is talking about information content. That’s a distinct issue from simulating the universe which requires processing in a subset. It might be possible for someone to write down a complete mathematical description of the universe (i.e. initial conditions and then a time parameter from that point describing its subsequent evolution) but that doesn’t mean one can actually compute useful things about it.
Sorry, but could you fix that link to go to the arXiv page rather than directly to the PDF?
Fixed.