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Mirrors > Home > MPE Home > Th. List > fnmpti | Structured version Visualization version GIF version |
Description: Functionality and domain of an ordered-pair class abstraction. (Contributed by NM, 29-Jan-2004.) (Revised by Mario Carneiro, 31-Aug-2015.) |
Ref | Expression |
---|---|
fnmpti.1 | ⊢ 𝐵 ∈ V |
fnmpti.2 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
Ref | Expression |
---|---|
fnmpti | ⊢ 𝐹 Fn 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fnmpti.1 | . . 3 ⊢ 𝐵 ∈ V | |
2 | 1 | rgenw 3077 | . 2 ⊢ ∀𝑥 ∈ 𝐴 𝐵 ∈ V |
3 | fnmpti.2 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
4 | 3 | mptfng 6568 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ V ↔ 𝐹 Fn 𝐴) |
5 | 2, 4 | mpbi 229 | 1 ⊢ 𝐹 Fn 𝐴 |
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