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Von Neumann�Bernays�G�del Set Theory (NBG)
Von Neumann�Bernays�G�del Set Theory (NBG)
Apr 16, 2026
1 min read
set-theory
class-theory
Conservative extension of ZFC.
Sets and classes are both present.
Finitely axiomatizable.
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Zermelo–Fraenkel Set Theory with the Axiom of Choice
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