Article View: sci.logic
Article #282Re: Impredicativity - was: Russell's Paradox.
From: Robert M. Solovay
Date: Thu, 05 Nov 1992 09:06
Date: Thu, 05 Nov 1992 09:06
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In article <1992Nov4.221041.4812@CSD-NewsHost.Stanford.EDU> pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt) writes: >It should be pointed out that neither of the two axiomatizations of ZF >(that I took as definitive of ZF for my bet that ZF will be shown >inconsistent by 2012) mention FA. These were the axiomatizations of >Takeuti and Zaring in their book "Introduction to Axiomatic Set >Theory", and of Schoenfield in his article in Barwise's "Handbook of >Mathematical Logic." I selected these only because of their >accessibility, not because they omitted FA. In fact I do not know of >an equally accessible axiomatization of ZF that includes FA (we >amateurs are appallingly ignorant). Randall, you're the one appealing >to FA here, can you suggest a suitably accessible axiomatization that >includes it? It would come in handy for future reference. > >Vaughan Pratt There's no truth in logic, son. Foundation is definitely considered one of the standard axioms of ZF. Try Kunen, Set Theory:An introduction to Independence Proofs, for example. Bob Solovay solovay@math.berkeley.edu
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Path: arc1-ca.pugleaf.net!sparky!uunet!caen!spool.mu.edu!agate!solovay From: solovay@math.berkeley.edu (Robert M. Solovay) Newsgroups: sci.logic Subject: Re: Impredicativity - was: Russell's Paradox. Date: 5 Nov 1992 09:06:36 GMT Organization: U.C. Berkeley Math. Department. Lines: 23 Message-ID: <1dao6sINN6fs@agate.berkeley.edu> References: <1992Nov4.015603.16555@CSD-NewsHost.Stanford.EDU> <1992Nov4.161936.12444@guinness.idbsu.edu> <1992Nov4.221041.4812@CSD-NewsHost.Stanford.EDU> NNTP-Posting-Host: math.berkeley.edu