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ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - add the Axiom of Infinity
Eight inequivalent definitions of finite set
cfin4
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cfin3
Metamath Proof Explorer
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Syntax definition
cfin4
Description:
Extend class notation to include the class of IV-finite sets.
Ref
Expression
Assertion
cfin4
class
Fin
IV