[FOM] EFA/PA correspondence
Nik Weaver
nweaver at math.wustl.edu
Thu Oct 7 14:09:04 EDT 2010
Harvey Friedman quotes Richard Borcherds as asking
> (1) We have a hierarchy of stronger and stronger systems, starting
> at EFA and passing through PRA, PA, second order arithmetics, set
> theory, various large cardinal axioms, and so on. Why does almost
> all mathematics seem to need just the very lowest level of this?
Answer: because almost all mathematics is predicative.
Nik Weaver
Math Dept.
Washington University
St. Louis, MO 63130
nweaver at math.wustl.edu
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