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- Path: sparky!uunet!think.com!news!columbus
- From: columbus@strident.think.com (Michael Weiss)
- Newsgroups: sci.physics
- Subject: Re: Lowneheim-Skolem theorem (was: Continuos vs. discrete models)
- Date: 19 Nov 92 15:54:52
- Organization: Thinking Machines Corporation, Cambridge MA, USA
- Lines: 32
- Message-ID: <COLUMBUS.92Nov19155452@strident.think.com>
- References: <1992Nov17.124233.24312@oracorp.com>
- <1992Nov18.133219.6664@sei.cmu.edu> <362@mtnmath.UUCP>
- NNTP-Posting-Host: strident.think.com
- In-reply-to: paul@mtnmath.UUCP's message of 19 Nov 92 16:58:18 GMT
-
- In article <362@mtnmath.UUCP> paul@mtnmath.UUCP (Paul Budnik) writes:
-
-
- I think it will be difficult to build a discrete theory that
- encompasses GR and QM. The issue is not how difficult the theory is, but
- what approach gives the simplest model that accounts for experimental
- results. Arguments about countable sets have little relevance to this
- question.
-
- Yes! Exactly right!
-
- They do allow one to avoid making certain errors such as
- thinking that the continuum is a necessary mathematical element in
- any physical theory.
-
- Did anyone ever make this claim, i.e., that it is impossible to build a
- consistent physical theory without the continuum? My impression is that
- the Defenders of the Continuum (hmm... sounds like the title for an SF
- novel) in this newsgroup simply prefer continuum math to discrete math--
- and also, there are well-worked continuum-based theories, with warts to be
- sure, for which detailed discrete replacements have yet to be offered.
-
- "We can dream, but we need not deliberately court nightmares." For some,
- getting rid of R looks like a nightmare.
-
- Personally, I am not fond of the Brouwer-Heyting-Bishop approach to
- mathematics. On the other hand, I think it would be delightful if someone
- created a new physical theory out of some strange-smelling brew of math
- logic, model theory, and who know what else (braids too, gotta have
- braids!), that at one blow "solved" quantum gravity, gave a new resolution
- to all the old QM koans, and predicted new, experimentally verified,
- physics. However, I'm not holding my breath.
-