Theorem ovexi

Description: The result of an operation is a set. (Contributed by Glauco Siliprandi, 26-Jun-2021)

	Ref	Expression
Hypothesis	ovexi.1	⊢ 𝐴 = ( 𝐵 𝐹 𝐶 )
Assertion	ovexi	⊢ 𝐴 ∈ V

Proof

Step	Hyp	Ref	Expression
1		ovexi.1	⊢ 𝐴 = ( 𝐵 𝐹 𝐶 )
2		ovex	⊢ ( 𝐵 𝐹 𝐶 ) ∈ V
3	1 2	eqeltri	⊢ 𝐴 ∈ V