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Metamath Proof Explorer

Syntax definition coprab

Description: Extend class notation to include class abstraction (class builder) of nested ordered pairs.

		Ref	Expression
	Assertion	coprab	class { ⟨ ⟨ 𝑥 , 𝑦 ⟩ , 𝑧 ⟩ ∣ 𝜑 }