[FOM] Remedial mathematics?

Arnold Neumaier Arnold.Neumaier at univie.ac.at
Mon Jun 6 14:52:22 EDT 2011


Walt Read wrote:
> To extend the analogy a little, the result of the work on non-standard
> (non-Euclidean) models of geometry was a recognition of the other
> models as equally valid. Eventually it was considered reasonable that
> even ``the" universe might better be modeled by one of the
> non-standard models. Do we see N the same way? Is there a unique thing
> denoted by ``the natural numbers", accessible to us through intuition
> or however, with the non-standard models of PA being essentially
> artifacts of the formalization process? Or do the non-standard models
> have equal claim as models of ``the natural numbers"? 

It is impossible to use any of the nonstandard natural numbers for 
counting - only the standard subset of natural numbers is being used for 
that.

This distinguishes ''the'' natural numbers from nonstandard models of 
the Peano axioms.


More information about the FOM mailing list