Database
ZF (ZERMELO-FRAENKEL) SET THEORY
ZF Set Theory - start with the Axiom of Extensionality
Unordered and ordered pairs
ctp
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df-tp
Metamath Proof Explorer
Ascii
Structured
Syntax definition
ctp
Description:
Extend class notation to include unordered triplet.
Ref
Expression
Assertion
ctp
class
{
𝐴
,
𝐵
,
𝐶
}