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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dmmptdf | Structured version Visualization version GIF version | ||
| Description: The domain of the mapping operation, deduction form. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
| Ref | Expression |
|---|---|
| dmmptdf.x | ⊢ Ⅎ𝑥𝜑 |
| dmmptdf.a | ⊢ 𝐴 = (𝑥 ∈ 𝐵 ↦ 𝐶) |
| dmmptdf.c | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| dmmptdf | ⊢ (𝜑 → dom 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmptdf.x | . 2 ⊢ Ⅎ𝑥𝜑 | |
| 2 | nfcv 2905 | . 2 ⊢ Ⅎ𝑥𝐵 | |
| 3 | dmmptdf.a | . 2 ⊢ 𝐴 = (𝑥 ∈ 𝐵 ↦ 𝐶) | |
| 4 | dmmptdf.c | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ 𝑉) | |
| 5 | 1, 2, 3, 4 | dmmptdff 45228 | 1 ⊢ (𝜑 → dom 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 Ⅎwnf 1783 ∈ wcel 2108 ↦ cmpt 5225 dom cdm 5685 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-sep 5296 ax-nul 5306 ax-pr 5432 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ral 3062 df-rab 3437 df-v 3482 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-nul 4334 df-if 4526 df-sn 4627 df-pr 4629 df-op 4633 df-br 5144 df-opab 5206 df-mpt 5226 df-xp 5691 df-rel 5692 df-cnv 5693 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 |
| This theorem is referenced by: smfpimltmpt 46761 smfadd 46780 smfpimgtmpt 46796 smfpimioompt 46801 smfrec 46804 smfmul 46810 smfmulc1 46811 smfsupmpt 46830 smfinfmpt 46834 smflimsupmpt 46844 smfliminfmpt 46847 |
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