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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 5319 | . 2 ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ V) | |
| 2 | onintrab 7796 | . 2 ⊢ (∩ {𝑥 ∈ On ∣ 𝜑} ∈ V ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ On) | |
| 3 | 1, 2 | bitri 278 | 1 ⊢ (∃𝑥 ∈ On 𝜑 ↔ ∩ {𝑥 ∈ On ∣ 𝜑} ∈ On) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∈ wcel 2143 ∃wrex 3089 {crab 3416 Vcvv 3455 ∩ cint 4913 Oncon0 6362 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-int 4914 df-br 5111 df-opab 5175 df-tr 5220 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6365 df-on 6366 |
| This theorem is referenced by: oeeulem 8588 cofon1 8659 cofon2 8660 cofonr 8661 naddcllem 8663 naddunif 8681 cardmin2 9986 cardaleph 10074 cardmin 10549 nosepon 27807 onvf1odlem4 35568 nmulprop 36660 nmuladdel 36667 minregex 44240 |
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