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Syntax Definition copab 3565
Description: Extend class notation to include ordered-pair class abstraction (class builder).
Hypotheses
Ref Expression
wph wff ph
vx set x
vy set y
Assertion
Ref Expression
copab class {<.x, y>. | ph}
See definition df-opab 3566 for more information.
Colors of variables: wff set class
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