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- Path: sparky!uunet!mtnmath!paul
- From: paul@mtnmath.UUCP (Paul Budnik)
- Newsgroups: sci.physics
- Subject: Continuos vs. discrete models Was: The size of electrons, ...
- Message-ID: <344@mtnmath.UUCP>
- Date: 11 Nov 92 16:35:15 GMT
- References: <1992Nov6.142004.9208@prim> <1992Nov7.214329.24552@galois.mit.edu> <1992Nov10.173302.27756@sun0.urz.uni-heidelberg.de>
- Organization: Mountain Math Software, P. O. Box 2124, Saratoga. CA 95070
- Lines: 31
-
- In article <1992Nov10.173302.27756@sun0.urz.uni-heidelberg.de>, gsmith@lauren.iwr.uni-heidelberg.de (Gene W. Smith) writes:
- > In article <1992Nov8.154955.15938@prim> dave@prim.demon.co.uk (Dave
- > Griffiths) writes:
- >
- > >Our current theories say that spacetime is infinitely subdivisable. ...
- > ... Occams razor
- > >might suggest that there are _no_ continuums out there. We can get by OK
- > >without 'em.
- >
- > We can also get by with 'em. If the simplest idea is the best, it
- > follows that if continuums are simplest, they are best.
- >
- This is the question. Continuous models are the simplest to work with
- mathematically, but are the simplest possibility as models of physical
- reality? I do not think so. The information content of any finite volume
- of space-time with a finite energy appears to be finite. Using continuous
- models to build finite structures is extreme overkill of the kind nature
- does not seem to use.
-
- There is good reason to suspect that no completed infinite totalities
- exist. The continuum that appears in formal mathematical systems is different
- then what mathematicians mean by `the continuum'. The latter is a speculative
- philosophical idea that cannot be formalized mathematically. For example
- the real numbers definable in any consistent formal system are countable.
- They are just not countable *within* that system. Some mathematicians
- will claim they can formalize the `true continuum' by saying what they mean
- by real numbers is *all real numbers* not just those definable in a
- particular formal system. Whether *all real numbers* exists or this phrase
- has any mathematical meaning is itself a speculative philosophical question.
-
- Paul Budnik
-