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ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - start with the Axiom of Extensionality
Classes
Elementary properties of class abstractions
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eqabdv
Metamath Proof Explorer
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Structured
Table of Contents - 2.1.2.4. Elementary properties of class abstractions
eqabdv
eqabcdv
eqabi
abid1
abid2
eqab
eqabb
eqabbOLD
eqabcb
eqabrd
eqabri
eqabcri
clelab
clelabOLD
clabel
sbab