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- Newsgroups: sci.logic
- Path: sparky!uunet!paladin.american.edu!news.univie.ac.at!hp4at!mcsun!sunic!sics.se!torkel
- From: torkel@sics.se (Torkel Franzen)
- Subject: Re: Do completed infinite totalities exist? Was: Lowneheim-Skolem theorem
- In-Reply-To: paul@mtnmath.UUCP's message of 21 Nov 92 16:49:29 GMT
- Message-ID: <TORKEL.92Nov21195445@bast.sics.se>
- Sender: news@sics.se
- Organization: Swedish Institute of Computer Science, Kista
- References: <1992Nov17.124233.24312@oracorp.com> <TORKEL.92Nov20160605@lludd.sics.se>
- <369@mtnmath.UUCP>
- Date: Sat, 21 Nov 1992 18:54:45 GMT
- Lines: 14
-
-
- >Everything in mathematics is "relative" to some formal system. To talk
- >about what is absolutely true independent of a formal system is philosophy
- >not mathematics.
-
- The distinction is quite simple. "Provability in T" is an example of a
- concept that has a formal system as a parameter, "uncountable" is an
- example of a concept that has no formal system as a parameter, whether
- explicit or implicit.
-
- "Absolute truth" has nothing to do with this. It's just a matter of what
- we say and mean in mathematics. The notion that "everything in mathematics is
- relative to some formal system", on the other hand, is the expression of
- some philosophical doctrine.
-