[FOM] Free ultrafilters on N.

Bill Taylor W.Taylor at math.canterbury.ac.nz
Wed Oct 11 22:27:58 EDT 2006

I asked this on another forum, and got a nice response, but maybe
people here will have some different ideas about it.

Is it possible/easy to describe in some way, how to have two non-isomorphic
free ultrafilters on the integers, where isomorphism is defined
with respect to permutations on the integers.


W Taylor

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