cpr - Metamath Proof Explorer

Metamath Proof Explorer

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Syntax Definition cpr 2468

Description: Extend class notation to include unordered pair.

**Hypotheses**
Ref	Expression
cA	class A
cB	class B

**Assertion**
Ref	Expression
cpr	class {A, B}

See definition df-pr 2471 for more information.

Colors of variables: wff set class