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Related theorems GIF version |
| Description: Existence of a function expressed as class of ordered pairs. |
| Ref | Expression |
|---|---|
| funopabex.1 | ⊢ A ∈ V |
| funopabex.2 | ⊢ (x ∈ A → ∃*yφ) |
| Ref | Expression |
|---|---|
| funopabex | ⊢ {〈x, y〉∣(x ∈ A ∧ φ)} ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funopabex.1 | . . 3 ⊢ A ∈ V | |
| 2 | dmopabss 2540 | . . 3 ⊢ dom {〈x, y〉∣(x ∈ A ∧ φ)} ⊆ A | |
| 3 | 1, 2 | ssexi 1701 | . 2 ⊢ dom {〈x, y〉∣(x ∈ A ∧ φ)} ∈ V |
| 4 | funopab 2694 | . . 3 ⊢ (Fun {〈x, y〉∣(x ∈ A ∧ φ)} ↔ ∀x∃*y(x ∈ A ∧ φ)) | |
| 5 | funopabex.2 | . . . 4 ⊢ (x ∈ A → ∃*yφ) | |
| 6 | moanimv 1052 | . . . 4 ⊢ (∃*y(x ∈ A ∧ φ) ↔ (x ∈ A → ∃*yφ)) | |
| 7 | 5, 6 | mpbir 165 | . . 3 ⊢ ∃*y(x ∈ A ∧ φ) |
| 8 | 4, 7 | mpgbir 686 | . 2 ⊢ Fun {〈x, y〉∣(x ∈ A ∧ φ)} |
| 9 | funex 2741 | . 2 ⊢ (dom {〈x, y〉∣(x ∈ A ∧ φ)} ∈ V → (Fun {〈x, y〉∣(x ∈ A ∧ φ)} → {〈x, y〉∣(x ∈ A ∧ φ)} ∈ V)) | |
| 10 | 3, 8, 9 | mp2 43 | 1 ⊢ {〈x, y〉∣(x ∈ A ∧ φ)} ∈ V |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∃*wmo 1008 ∈ wcel 1092 Vcvv 1348 {copab 2055 dom cdm 2410 Fun wfun 2416 |
| This theorem is referenced by: pw2en 3348 mapxpen 3390 xpmapenlem2 3392 xpmapenlem4 3394 xpmapenlem5 3395 aceq4 3557 aceq6a 3564 seqval 4665 occllem6 5185 occllem7 5186 projlem25 5217 projlem26 5218 projlem31 5223 pjmvalt 5245 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 |