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Syntax Definition copab 4540
Description: Extend class notation to include ordered-pair class abstraction (class builder).
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
vy setvar 𝑦
Assertion
Ref Expression
copab class {⟨𝑥, 𝑦⟩ ∣ 𝜑}

See definition df-opab 4542 for more information.

Colors of variables: wff setvar class
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