⚛️Igor Kan
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Morse�Kelley Set Theory (MK)
Morse�Kelley Set Theory (MK)
Apr 27, 2026
1 min read
set-theory
class-theory
Stronger than NBG.
Allows full class quantification.
Not finitely axiomatizable unless restricted.
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Zermelo–Fraenkel Set Theory with the Axiom of Choice
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