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(Q8083999)
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English
Buchholz's ordinal
the proof‐theoretic ordinal of the subsystem Π₁¹‐CA₀ of 2nd‐order arithmetic
Ψ₀(Ωω)
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instance of
large countable ordinal
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Freebase ID
/m/080cf0n
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Buchholz's ordinal
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