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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 → ( 𝐴 𝐹 𝐵 ) ∈ V )

Proof

Step Hyp Ref Expression
1 ovex ⊢ ( 𝐴 𝐹 𝐵 ) ∈ V
2 1 a1i ⊢ ( 𝜑 → ( 𝐴 𝐹 𝐵 ) ∈ V )