Can atoms exist in a 2D universe?
I remember having read that 17 sort of atoms can exist in some natural
I don't know if this is related to the anyons and Hall effects where
particles are squeezed in two dimensional trap (by powerful magnetic
I have independent reason that the 2-dim topological space (and 2 + 1)
continuous deformation are quite important in fundamental physics. But
this has not yet been extracted from comp (to be sure).
AFAIK, physics is very different when constrained to only 2D. My point
is that the notion of computation is meaningless if there is no
possibility of a stable structure on and in which to implement the
This is false imo. A computation can be given a sense in pure
arithmetic (if only by Godel's arithmetization device).
If you postulate a physical universe at the start, you need to
postulate some ad-hoc highly non comp thesis to attach the first person
Platonic Numbers or bit-strings have no ability to do anything by
themselves (by definition!)
But numbers can do things by themselves relatively to other (universal)
numbers. That is what computer science is all about, I think.
and thus appeals to their existence are vacuous.