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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 8994 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9955 | . 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 2145 class class class wbr 5107 dom cdm 5659 Oncon0 6361 ≈ cen 8953 cardccrd 9944 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-pow 5334 ax-pr 5402 ax-un 7740 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-int 4911 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-ord 6364 df-on 6365 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-en 8957 df-card 9948 |
| This theorem is used by: oncardval 9964 oncardid 9965 cardnn 9972 iscard 9984 carduni 9990 nnsdomel 9999 harsdom 10004 harsucnn 10007 pm54.43lem 10009 infxpenlem 10020 infxpidm2 10024 onssnum 10047 alephnbtwn 10078 alephnbtwn2 10079 alephordilem1 10080 alephord2 10083 alephsdom 10093 cardaleph 10096 infenaleph 10098 alephinit 10102 iunfictbso 10121 ficardun2 10208 pwsdompw 10209 infunsdom1 10218 ackbij2 10248 cfflb 10265 sdom2en01 10308 fin23lem22 10333 iunctb 10587 alephadd 10590 alephmul 10591 alephexp1 10592 alephsuc3 10593 canthp1lem2 10666 pwfseqlem4a 10674 pwfseqlem4 10675 pwfseqlem5 10676 gchaleph 10684 gchaleph2 10685 hargch 10686 cygctb 20025 ttac 43885 numinfctb 43952 isnumbasgrplem2 43953 isnumbasabl 43955 iscard4 44381 minregex2 44383 harval3 44386 harval3on 44387 aleph1min 44405 |
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