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- From: holmes@opal.idbsu.edu (Randall Holmes)
- Subject: Re: Numbers and sets
- Message-ID: <1993Jan3.220225.2293@guinness.idbsu.edu>
- Sender: usenet@guinness.idbsu.edu (Usenet News mail)
- Nntp-Posting-Host: opal
- Organization: Boise State University
- References: <1992Dec27.035413.18857@husc3.harvard.edu> <1992Dec28.165203.402@guinness.idbsu.edu> <1993Jan2.223636.18944@husc3.harvard.edu>
- Date: Sun, 3 Jan 1993 22:02:25 GMT
- Lines: 52
-
- In article <1993Jan2.223636.18944@husc3.harvard.edu> zeleny@husc10.harvard.edu (Michael Zeleny) writes:
- >In article <1992Dec28.165203.402@guinness.idbsu.edu>
- >holmes@opal.idbsu.edu (Randall Holmes) writes:
- >
- >>I'm avoiding nested quotations here.
-
- ...again.
-
- >Randall, you are conveniently neglecting the history of the matter.
- >Cantor, Dedekind, and Zermelo were there long before Quine and Jensen;
- >moreover, their use of the term is overwhelmingly prevalent among set
- >theoreticians. Your professional entitlement in no way absolves you
- >from the responsibility for usurping a term possessed of a well-defined
- >conventional meaning. You have acknowledged that your reference to
- >"sets" involves a radically unorthodox conception of the same; surely
- >you do not fancy that there remains a practical chance that it would
- >prevail over the Cantorian one. Indeed, even with the Axiom of Choice,
- >where one may cite genuine mathematical motivations for alternative
- >assumptions (vs. the extramathematical considerations adduced by Aczel
- >and Co in favor of rejecting the Axiom of Foundation), the consensus is
- >that the descriptive set theorists who adopt the Axiom of Determinacy,
- >are really investigating a *deviant* set theory. Thus, inasmuch as I am
- >conducting this discussion in accordance with the social conventions of
- >the English language, I am perfectly well justified in assuming that
- >sets are characterized as members of the cumulative hierarchy, and so
- >likewise -- in claiming that Foundation and Choice are analytically true
- >of sets.
-
- On the definition "element of the cumulative hierarchy", Foundation
- becomes analytic, but this is _not_ the case for Choice. Choice has
- always been regarded as somewhat dubious, and mathematical practice
- reflects this; people generally take care to indicate when it is used,
- which they would not do with an analytic principle. (I subscribe to
- the Axiom of Choice myself as true, but not analytic).
-
- >
- >>--
- >>The opinions expressed | --Sincerely,
- >>above are not the "official" | M. Randall Holmes
- >>opinions of any person | Math. Dept., Boise State Univ.
- >>or institution. | holmes@opal.idbsu.edu
- >
- >cordially,
- >mikhail zeleny@husc.harvard.edu
- >"Le cul des femmes est monotone comme l'esprit des hommes."
-
-
- --
- The opinions expressed | --Sincerely,
- above are not the "official" | M. Randall Holmes
- opinions of any person | Math. Dept., Boise State Univ.
- or institution. | holmes@opal.idbsu.edu
-