[FOM] Paradoxes and Platonism
Martin Davis
martin at eipye.com
Wed May 21 14:31:17 EDT 2008
It is alleged that the Russell paradox of the set
of all sets not belonging to themselves is a
problem for Platonists. The most famous Platonist
of them all, Gödel, pointed out that the sets
that occur in mathematics are those built up from
the empty set by iterating the power set
operation indefinitely (so-called iterative
notion of set - going back to Zermelo's 1930
paper). Since none of these sets are members of
themselves, what the paradox tells us is that there is no universal set.
Martin Davis
Visiting Scholar UC Berkeley
Professor Emeritus, NYU
martin at eipye.com
(Add 1 and get 0)
http://www.eipye.com
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