[comp.ai] "in any case rubin's statement is still true

silber@voodoo.ucsb.edu (08/14/89)

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It seems that I recall that axiomatic set theory was/is critical to the
foundations of modern mathematics.  I still question whether, in a different
possible universe where there are no discrete particles, no inhomogeneities,
that mathematics will 'work' the same as here. Of course, in such a
an extreme case as that, there probably are no thinking agents either, but it
might be possible to relax the conditions of the example just enough
to allow some structure (hence the existence of 
some combinational/associational/logical systems), a structure within which,
 however, certain sets of axioms which we find consistent HERE
are inconsistent THERE!

jk3k+@andrew.cmu.edu (Joe Keane) (08/15/89)

In article <2208@hub.UUCP> silber@voodoo.ucsb.edu writes:
>It seems that I recall that axiomatic set theory was/is critical to the
>foundations of modern mathematics.  I still question whether, in a different
>possible universe where there are no discrete particles, no inhomogeneities,
>that mathematics will 'work' the same as here.

I agree that someone in a different universe may be interested in different
kinds of mathematics.  For example, someone in a very discrete universe may
never have thought about eigenvalue problems.  Because of this, they may base
it on something other than set theory.  But ours will still ``work''.

>Of course, in such a
>an extreme case as that, there probably are no thinking agents either, but it
>might be possible to relax the conditions of the example just enough
>to allow some structure (hence the existence of 
>some combinational/associational/logical systems), a structure within which,
> however, certain sets of axioms which we find consistent HERE
>are inconsistent THERE!

The key is that mathematics is not based on any structure in our universe.  You
can talk about mathematical objects completely independent of any physical
basis.  Physics, on the other hand, could obviously be much different.