Description: The image of a set is a set. Deduction version of imaexg . (Contributed by Thierry Arnoux, 14-Feb-2025)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | rnexd.1 | ⊢ ( 𝜑 → 𝐴 ∈ 𝑉 ) | |
| Assertion | imaexd | ⊢ ( 𝜑 → ( 𝐴 “ 𝐵 ) ∈ V ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rnexd.1 | ⊢ ( 𝜑 → 𝐴 ∈ 𝑉 ) | |
| 2 | imaexg | ⊢ ( 𝐴 ∈ 𝑉 → ( 𝐴 “ 𝐵 ) ∈ V ) | |
| 3 | 1 2 | syl | ⊢ ( 𝜑 → ( 𝐴 “ 𝐵 ) ∈ V ) |