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Metamath Proof Explorer

Theorem ovexd

Description: The result of an operation is a set. (Contributed by Glauco Siliprandi, 23-Oct-2021)

		Ref	Expression
	Assertion	ovexd	$⊢ φ \to A F B \in V$

Step	Hyp	Ref	Expression
1		ovex	$⊢ A F B \in V$
2	1	a1i	$⊢ φ \to A F B \in V$