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- Newsgroups: sci.physics
- Path: sparky!uunet!mcsun!sunic!aun.uninett.no!nuug!nntp.uio.no!news
- From: rivero <rivero@cc.unizar.es>
- Subject: Re: Lowenheim-Skolem theorem (was: Continuos vs. discrete models)
- Message-ID: <1992Nov19.172844.17787@ulrik.uio.no>
- X-Xxdate: Thu, 19 Nov 92 18:26:16 GMT
- Sender: news@ulrik.uio.no (Mr News)
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- Organization: fisica teorica UZ
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- References: <1992Nov17.124233.24312@oracorp.com> <361@mtnmath.UUCP> <TORKEL.92Nov18193457@bast.sics.se> <COLUMBUS.92Nov19105153@strident.think.com>
- Date: Thu, 19 Nov 1992 17:28:44 GMT
- Lines: 27
-
- In article <COLUMBUS.92Nov19105153@strident.think.com> Michael Weiss,
- columbus@strident.think.com writes:
- >Assuming one could axiomatize, say, QED as a consistent first-order theory
- >(insert obligatory comment by John Baez on how this hasn't been done yet--
- >that is, the combination of defining the formal system QED and proving
- >Con(ZF)-->Con(QED) hasn't been carried out), it follows that there is a
- >countable model that looks EXACTLY LIKE the continous model, so far as
- >statements we can make in the language of the theory. And if the
- >axiomatization is worthy of the name, then such statements are all a
- >physicist cares about. Metamathematics is metaphysics, in this case.
-
-
- Wasnt L-H theorem the kind of things that let you go in both directions?
- This is, given a model, you can get ones with lower cardinality, and
- others with higher.
- I think to remember that you can always go higher by using
- Los theorem, ultraproducts, or something so?. This was the thing
- Robinson did to go over no-standard (*), is this?
-
- (Sorry by the quantity of question marks, but Metamatematical Physics
- is always a peripherical issue)
-
- -Alejandro Rivero
- Zaragoza Univ, Spain
-
- (*) In this sense ,there was some papers from S. Albeverio relating
- non standard constructions and path integral integrations etc...
-