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| Mirrors > Home > MPE Home > Th. List > onintrab2 | Structured version Visualization version GIF version | ||
| Description: An existence condition equivalent to an intersection's being an ordinal number. (Contributed by NM, 6-Nov-2003.) |
| Ref | Expression |
|---|---|
| onintrab2 | ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | intexrab 5285 | . 2 ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ V) | |
| 2 | onintrab 7729 | . 2 ⊢ (∩ {𝑥 ∈ On ∣ 𝜑} ∈ V ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ On) | |
| 3 | 1, 2 | bitri 275 | 1 ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∈ wcel 2111 ∃wrex 3056 {crab 3395 Vcvv 3436 ∩ cint 4897 Oncon0 6306 |
| 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 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-int 4898 df-br 5092 df-opab 5154 df-tr 5199 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-we 5571 df-ord 6309 df-on 6310 |
| This theorem is referenced by: oeeulem 8516 cofon1 8587 cofon2 8588 cofonr 8589 naddcllem 8591 naddunif 8608 cardmin2 9889 cardaleph 9977 cardmin 10452 nosepon 27602 onvf1odlem4 35138 minregex 43566 |
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