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 )