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| Mirrors > Home > MPE Home > Th. List > onenon | Structured version Visualization version GIF version | ||
| Description: Every ordinal number is numerable. (Contributed by Mario Carneiro, 29-Apr-2015.) |
| Ref | Expression |
|---|---|
| onenon | ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | enrefg 9015 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 10031 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
| 3 | 1, 2 | mpdan 700 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 class class class wbr 5102 dom cdm 5650 Oncon0 6362 ≈ cen 8974 cardccrd 10020 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7752 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ord 6365 df-on 6366 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-en 8978 df-card 10024 |
| This theorem is used by: oncardval 10040 oncardid 10041 cardnn 10048 iscard 10060 carduni 10066 nnsdomel 10075 harsdom 10080 harsucnn 10083 pm54.43lem 10085 infxpenlem 10096 infxpidm2 10100 onssnum 10123 alephnbtwn 10154 alephnbtwn2 10155 alephordilem1 10156 alephord2 10159 alephsdom 10169 cardaleph 10172 infenaleph 10174 alephinit 10178 iunfictbso 10197 ficardun2 10284 pwsdompw 10285 infunsdom1 10294 ackbij2 10324 cfflb 10341 sdom2en01 10384 fin23lem22 10409 iunctb 10663 alephadd 10666 alephmul 10667 alephexp1 10668 alephsuc3 10669 canthp1lem2 10742 pwfseqlem4a 10750 pwfseqlem4 10751 pwfseqlem5 10752 gchaleph 10760 gchaleph2 10761 hargch 10762 cygctb 20112 j0ltaleph 35948 ttac 44137 numinfctb 44199 isnumbasgrplem2 44200 isnumbasabl 44202 iscard4 44628 minregex2 44630 harval3 44633 harval3on 44634 aleph1min 44652 |
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