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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 8921 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9858 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
| 3 | 1, 2 | mpdan 687 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 class class class wbr 5098 dom cdm 5624 Oncon0 6317 ≈ cen 8880 cardccrd 9847 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| 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-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-int 4903 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-ord 6320 df-on 6321 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-en 8884 df-card 9851 |
| This theorem is referenced by: oncardval 9867 oncardid 9868 cardnn 9875 iscard 9887 carduni 9893 nnsdomel 9902 harsdom 9907 harsucnn 9910 pm54.43lem 9912 infxpenlem 9923 infxpidm2 9927 onssnum 9950 alephnbtwn 9981 alephnbtwn2 9982 alephordilem1 9983 alephord2 9986 alephsdom 9996 cardaleph 9999 infenaleph 10001 alephinit 10005 iunfictbso 10024 ficardun2 10112 pwsdompw 10113 infunsdom1 10122 ackbij2 10152 cfflb 10169 sdom2en01 10212 fin23lem22 10237 iunctb 10485 alephadd 10488 alephmul 10489 alephexp1 10490 alephsuc3 10491 canthp1lem2 10564 pwfseqlem4a 10572 pwfseqlem4 10573 pwfseqlem5 10574 gchaleph 10582 gchaleph2 10583 hargch 10584 cygctb 19821 ttac 43278 numinfctb 43345 isnumbasgrplem2 43346 isnumbasabl 43348 iscard4 43774 minregex2 43776 harval3 43779 harval3on 43780 aleph1min 43798 |
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