Analogs of the Church-Kleene ordinal for arbitrary complexity classes of decision problems.pic.twitter.com/pfQwv7pspq
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Analogs of the Church-Kleene ordinal for arbitrary complexity classes of decision problems.pic.twitter.com/pfQwv7pspq
Apparently Kleene proved that \omega_1^{PR} = \omega_1^{CK}.
\omega_1^P = \omega_1^{CK}. In fact, every recursive ordinal is order-type of a wellordering that's computable in linear time and log space.
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