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Metamath Proof Explorer

Theorem ovex

Description: The result of an operation is a set. (Contributed by NM, 13-Mar-1995)

		Ref	Expression
	Assertion	ovex	$⊢ A F B \in V$

Step	Hyp	Ref	Expression
1		df-ov	$⊢ A F B = F (⟨A, B⟩)$
2	1	fvexi	$⊢ A F B \in V$