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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 6603 | . . 3 ⊢ (Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | opabex.2 | . . . 4 ⊢ (𝑥 ∈ 𝐴 → ∃*𝑦𝜑) | |
| 3 | moanimv 2647 | . . . 4 ⊢ (∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑) ↔ (𝑥 ∈ 𝐴 → ∃*𝑦𝜑)) | |
| 4 | 2, 3 | mpbir 234 | . . 3 ⊢ ∃*𝑦(𝑥 ∈ 𝐴 ∧ 𝜑) |
| 5 | 1, 4 | mpgbir 1832 | . 2 ⊢ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} |
| 6 | opabex.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 7 | dmopabss 5912 | . . 3 ⊢ dom {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ⊆ 𝐴 | |
| 8 | 6, 7 | ssexi 5291 | . 2 ⊢ dom {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V |
| 9 | funex 7256 | . 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 705 | 1 ⊢ {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2147 ∃*wmo 2565 Vcvv 3454 {copab 5173 dom cdm 5658 Fun wfun 6560 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 |
| This theorem is used by: (None) |
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