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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 5289 | . 2 ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ V) | |
| 2 | onintrab 7736 | . 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 2109 ∃wrex 3053 {crab 3396 Vcvv 3438 ∩ cint 4899 Oncon0 6311 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5238 ax-nul 5248 ax-pr 5374 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3397 df-v 3440 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-int 4900 df-br 5096 df-opab 5158 df-tr 5203 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-ord 6314 df-on 6315 |
| This theorem is referenced by: oeeulem 8526 cofon1 8597 cofon2 8598 cofonr 8599 naddcllem 8601 naddunif 8618 cardmin2 9914 cardaleph 10002 cardmin 10477 nosepon 27593 onvf1odlem4 35078 minregex 43507 |
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