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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 8961 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9901 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
| 3 | 1, 2 | mpdan 697 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2141 class class class wbr 5099 dom cdm 5645 Oncon0 6342 ≈ cen 8920 cardccrd 9890 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-pow 5321 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-int 4905 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-ord 6345 df-on 6346 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-en 8924 df-card 9894 |
| This theorem is referenced by: oncardval 9910 oncardid 9911 cardnn 9918 iscard 9930 carduni 9936 nnsdomel 9945 harsdom 9950 harsucnn 9953 pm54.43lem 9955 infxpenlem 9966 infxpidm2 9970 onssnum 9993 alephnbtwn 10024 alephnbtwn2 10025 alephordilem1 10026 alephord2 10029 alephsdom 10039 cardaleph 10042 infenaleph 10044 alephinit 10048 iunfictbso 10067 ficardun2 10155 pwsdompw 10156 infunsdom1 10165 ackbij2 10195 cfflb 10213 sdom2en01 10256 fin23lem22 10281 iunctb 10529 alephadd 10532 alephmul 10533 alephexp1 10534 alephsuc3 10535 canthp1lem2 10608 pwfseqlem4a 10616 pwfseqlem4 10617 pwfseqlem5 10618 gchaleph 10626 gchaleph2 10627 hargch 10628 cygctb 19915 ttac 43577 numinfctb 43644 isnumbasgrplem2 43645 isnumbasabl 43647 iscard4 44073 minregex2 44075 harval3 44078 harval3on 44079 aleph1min 44097 |
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