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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dmmptif | Structured version Visualization version GIF version | ||
| Description: Domain of the mapping operation. (Contributed by Glauco Siliprandi, 21-Dec-2024.) |
| Ref | Expression |
|---|---|
| dmmptif.1 | ⊢ Ⅎ𝑥𝐴 |
| dmmptif.2 | ⊢ 𝐵 ∈ V |
| dmmptif.3 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Ref | Expression |
|---|---|
| dmmptif | ⊢ dom 𝐹 = 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmptif.1 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
| 2 | dmmptif.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 3 | dmmptif.3 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 4 | 1, 2, 3 | fnmptif 46416 | . 2 ⊢ 𝐹 Fn 𝐴 |
| 5 | fndm 6650 | . 2 ⊢ (𝐹 Fn 𝐴 → dom 𝐹 = 𝐴) | |
| 6 | 4, 5 | ax-mp 5 | 1 ⊢ dom 𝐹 = 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ∈ wcel 2146 Ⅎwnfc 2910 Vcvv 3453 ↦ cmpt 5188 dom cdm 5654 Fn wfn 6541 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-pr 5394 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ral 3080 df-rex 3090 df-rab 3416 df-v 3455 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-sn 4588 df-pr 4590 df-op 4838 df-br 5106 df-opab 5170 df-mpt 5189 df-id 5549 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-fun 6548 df-fn 6549 |
| This theorem is used by: adddmmbl2 47983 muldmmbl2 47985 smfdivdmmbl2 47990 |
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