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| Mirrors > Home > MPE Home > Th. List > opabex | Structured version Visualization version GIF version | ||
| Description: Existence of a function expressed as class of ordered pairs. (Contributed by NM, 21-Jul-1996.) |
| Ref | Expression |
|---|---|
| opabex.1 | ⊢ 𝐴 ∈ V |
| opabex.2 | ⊢ (𝑥 ∈ 𝐴 → ∃*𝑦𝜑) |
| Ref | Expression |
|---|---|
| opabex | ⊢ {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funopab 6525 | . . 3 ⊢ (Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | opabex.2 | . . . 4 ⊢ (𝑥 ∈ 𝐴 → ∃*𝑦𝜑) | |
| 3 | moanimv 2617 | . . . 4 ⊢ (∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑) ↔ (𝑥 ∈ 𝐴 → ∃*𝑦𝜑)) | |
| 4 | 2, 3 | mpbir 231 | . . 3 ⊢ ∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑) |
| 5 | 1, 4 | mpgbir 1800 | . 2 ⊢ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} |
| 6 | opabex.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 7 | dmopabss 5865 | . . 3 ⊢ dom {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ⊆ 𝐴 | |
| 8 | 6, 7 | ssexi 5265 | . 2 ⊢ dom {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V |
| 9 | funex 7163 | . 2 ⊢ ((Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∧ dom {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V) → {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V) | |
| 10 | 5, 8, 9 | mp2an 692 | 1 ⊢ {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 ∃*wmo 2535 Vcvv 3438 {copab 5158 dom cdm 5622 Fun wfun 6484 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 |
| This theorem is referenced by: (None) |
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