Syntax Definition copab 4042

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 4044 for more information.