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- Path: sparky!uunet!spool.mu.edu!mixcom.com!ttyytt
- From: ttyytt@mixcom.com (Adam Costello)
- Newsgroups: sci.math
- Subject: Re: Stupid question about FLT
- Message-ID: <1992Jul20.234036.9686@mixcom.com>
- Date: 20 Jul 92 23:40:36 GMT
- Article-I.D.: mixcom.1992Jul20.234036.9686
- References: <1992Jul18.224827.2167@sics.se> <1992Jul20.035836.4789@mixcom.com> <1992Jul20.080932.24570@sics.se>
- Organization: Milwaukee Internet Xchange BBS, Milwaukee, WI U.S.A.
- Lines: 19
-
- In article <1992Jul20.080932.24570@sics.se> torkel@sics.se (Torkel Franzen) writes:
- >In article <1992Jul20.035836.4789@mixcom.com> ttyytt@mixcom.com
- > (Adam Costello) writes:
- >
- > >Isn't it? I can think of a non-recursive set of axioms which would admit
- > >only models elementarily equivalent to the standard model N, namely the
- > >set Th N.
- >
- > Yes. However, Th N also has nonstandard models, and I thought that this
- >was what you meant by "models which aren't exactly like the natural
- >numbers". Anyway it is a good idea, I believe, to clarify this point.
-
- Okay, I see that you could imagine "non-standard" models of Th N, but since
- these models make exactly the same sentences true that N does, this brand
- of non-standardness isn't very upsetting. It's the possibility of a
- non-standard model that actually disagrees with N about the truth of some
- sentences that provokes discussions like the one we're in the middle of.
-
- AMC
-