[FOM] eliminating AC
P.B.Levy at cs.bham.ac.uk
Wed Mar 27 20:33:52 EDT 2013
>>> What is the simplest way to see that any arithmetical consequence
>>> of ZFC is a consequence of ZF?
Is this true for second-order sentences too? Sorry for the naive
question. I can see that it's not true for third-order sentences
(assuming ZF consistent), since well-orderability of the continuum is
And I ask the same question for ZF+CH.
Paul Blain Levy
School of Computer Science, University of Birmingham
+44 121 414 4792
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