Metamath Proof Explorer


Theorem elexd

Description: If a class is a member of another class, then it is a set. Deduction associated with elex . (Contributed by Glauco Siliprandi, 11-Oct-2020)

Ref Expression
Hypothesis elexd.1 ⊢ ( 𝜑 → 𝐴 ∈ 𝑉 )
Assertion elexd ( 𝜑 → 𝐴 ∈ V )

Proof

Step Hyp Ref Expression
1 elexd.1 ⊢ ( 𝜑 → 𝐴 ∈ 𝑉 )
2 elex ⊢ ( 𝐴 ∈ 𝑉 → 𝐴 ∈ V )
3 1 2 syl ⊢ ( 𝜑 → 𝐴 ∈ V )