Database
ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - start with the Axiom of Extensionality
Unordered and ordered pairs
cop
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df-op
Metamath Proof Explorer
Ascii
Structured
Syntax definition
cop
Description:
Extend class notation to include ordered pair.
Ref
Expression
Assertion
cop
class
⟨
𝐴
,
𝐵
⟩