[FOM] Poincaré Conjecture
asyropoulos at gmail.com
Tue Jan 15 15:01:21 EST 2008
Provided that it makes sense to ask, does anyone have any idea where
in the arithmetical hierarchy would one put Poincaré's Conjecture? I
mean is it a \Pi_2 problem, a \Pi_3
problem or what?
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