Database
ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - add the Axiom of Union
Ordinal arithmetic
c2o
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c3o
Metamath Proof Explorer
Ascii
Structured
Syntax definition
c2o
Description:
Extend the definition of a class to include the ordinal number 2.
Ref
Expression
Assertion
c2o
class
2
o