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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 8990 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9951 | . 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 2146 class class class wbr 5114 dom cdm 5666 Oncon0 6367 ≈ cen 8949 cardccrd 9940 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-pow 5341 ax-pr 5409 ax-un 7745 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-int 4918 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-ord 6370 df-on 6371 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-en 8953 df-card 9944 |
| This theorem is used by: oncardval 9960 oncardid 9961 cardnn 9968 iscard 9980 carduni 9986 nnsdomel 9995 harsdom 10000 harsucnn 10003 pm54.43lem 10005 infxpenlem 10016 infxpidm2 10020 onssnum 10043 alephnbtwn 10074 alephnbtwn2 10075 alephordilem1 10076 alephord2 10079 alephsdom 10089 cardaleph 10092 infenaleph 10094 alephinit 10098 iunfictbso 10117 ficardun2 10204 pwsdompw 10205 infunsdom1 10214 ackbij2 10244 cfflb 10261 sdom2en01 10304 fin23lem22 10329 iunctb 10577 alephadd 10580 alephmul 10581 alephexp1 10582 alephsuc3 10583 canthp1lem2 10656 pwfseqlem4a 10664 pwfseqlem4 10665 pwfseqlem5 10666 gchaleph 10674 gchaleph2 10675 hargch 10676 cygctb 19993 ttac 43804 numinfctb 43871 isnumbasgrplem2 43872 isnumbasabl 43874 iscard4 44300 minregex2 44302 harval3 44305 harval3on 44306 aleph1min 44324 |
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