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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 8924 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9861 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
| 3 | 1, 2 | mpdan 688 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 class class class wbr 5086 dom cdm 5624 Oncon0 6317 ≈ cen 8883 cardccrd 9850 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 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 8887 df-card 9854 |
| This theorem is referenced by: oncardval 9870 oncardid 9871 cardnn 9878 iscard 9890 carduni 9896 nnsdomel 9905 harsdom 9910 harsucnn 9913 pm54.43lem 9915 infxpenlem 9926 infxpidm2 9930 onssnum 9953 alephnbtwn 9984 alephnbtwn2 9985 alephordilem1 9986 alephord2 9989 alephsdom 9999 cardaleph 10002 infenaleph 10004 alephinit 10008 iunfictbso 10027 ficardun2 10115 pwsdompw 10116 infunsdom1 10125 ackbij2 10155 cfflb 10172 sdom2en01 10215 fin23lem22 10240 iunctb 10488 alephadd 10491 alephmul 10492 alephexp1 10493 alephsuc3 10494 canthp1lem2 10567 pwfseqlem4a 10575 pwfseqlem4 10576 pwfseqlem5 10577 gchaleph 10585 gchaleph2 10586 hargch 10587 cygctb 19858 ttac 43482 numinfctb 43549 isnumbasgrplem2 43550 isnumbasabl 43552 iscard4 43978 minregex2 43980 harval3 43983 harval3on 43984 aleph1min 44002 |
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