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Mirrors > Home > MPE Home > Th. List > feqmptd | Structured version Visualization version GIF version |
Description: Deduction form of dffn5 6151. (Contributed by Mario Carneiro, 8-Jan-2015.) |
Ref | Expression |
---|---|
feqmptd.1 | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
Ref | Expression |
---|---|
feqmptd | ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐴 ↦ (𝐹‘𝑥))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | feqmptd.1 | . . 3 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
2 | ffn 5958 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
3 | 1, 2 | syl 17 | . 2 ⊢ (𝜑 → 𝐹 Fn 𝐴) |
4 | dffn5 6151 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ 𝐹 = (𝑥 ∈ 𝐴 ↦ (𝐹‘𝑥))) | |
5 | 3, 4 | sylib 207 | 1 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐴 ↦ (𝐹‘𝑥))) |
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