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Syntax Definition copab 3787
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 3789 for more information.

Colors of variables: wff set class
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