home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.physics:14596 sci.math:11371
- Newsgroups: sci.physics,sci.math
- Path: sparky!uunet!stanford.edu!CSD-NewsHost.Stanford.EDU!Sunburn.Stanford.EDU!pratt
- From: pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt)
- Subject: Re: Report on Philosophies of Physicists
- Message-ID: <1992Sep13.234115.27540@CSD-NewsHost.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Organization: Computer Science Department, Stanford University.
- References: <TORKEL.92Sep12080037@bast.sics.se> <1992Sep13.045114.17931@CSD-NewsHost.Stanford.EDU> <1992Sep13.220940.4850@infodev.cam.ac.uk>
- Date: Sun, 13 Sep 1992 23:41:15 GMT
- Lines: 26
-
- In article <1992Sep13.220940.4850@infodev.cam.ac.uk> gjm11@cus.cam.ac.uk (G.J. McCaughan) writes:
- >In article <1992Sep13.045114.17931@CSD-NewsHost.Stanford.EDU> pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt) writes:
- >
- >>was impressive given Koenig's very high reputation.) A month later
- >>Zermelo was able to prove Cantor's continuum hypothesis assuming the
- >>Axiom of Choice, but despite the further uproar Zermelo's result
- >>produced, the eventual upshot was more to call AC into question than to
- >>resolve the continuum hypothesis.
- >
- >Are you sure about this? I mean, you don't say his proof was wrong or
- >anything, but I'm completely certain that not(CH) is consistent with AC.
- >In fact I can prove it. So errrm, do you mean that Zermelo was able to
- >think (wrongly) that he had proved CH using AC? or are we talking about
- >a radically different set theory to the one I'm thinking of? or what?
-
- Sorry about that. When you put a monkey at the keyboard you're more
- likely to get Usenet messages than Shakespeare. Replace the last two
- instances of "continuum hypothesis" in my paragraph by "every set is
- well-ordered" (which later was shown to be equivalent to AC, leaving AC
- as the preferred representative of this and a number of other
- equivalent statements).
-
- --
- ======================================================| God found the positive
- Vaughan Pratt pratt@cs.Stanford.EDU 415-494-2545 | integers, zero was
- ======================================================| there when He arrived.
-