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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 8979 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 9939 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≈ 𝐴) → 𝐴 ∈ dom card) | |
| 3 | 1, 2 | mpdan 699 | 1 ⊢ (𝐴 ∈ On → 𝐴 ∈ dom card) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2142 class class class wbr 5108 dom cdm 5660 Oncon0 6360 ≈ cen 8938 cardccrd 9928 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-pow 5335 ax-pr 5403 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 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 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-int 4912 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-ord 6363 df-on 6364 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-en 8942 df-card 9932 |
| This theorem is used by: oncardval 9948 oncardid 9949 cardnn 9956 iscard 9968 carduni 9974 nnsdomel 9983 harsdom 9988 harsucnn 9991 pm54.43lem 9993 infxpenlem 10004 infxpidm2 10008 onssnum 10031 alephnbtwn 10062 alephnbtwn2 10063 alephordilem1 10064 alephord2 10067 alephsdom 10077 cardaleph 10080 infenaleph 10082 alephinit 10086 iunfictbso 10105 ficardun2 10192 pwsdompw 10193 infunsdom1 10202 ackbij2 10232 cfflb 10249 sdom2en01 10292 fin23lem22 10317 iunctb 10565 alephadd 10568 alephmul 10569 alephexp1 10570 alephsuc3 10571 canthp1lem2 10644 pwfseqlem4a 10652 pwfseqlem4 10653 pwfseqlem5 10654 gchaleph 10662 gchaleph2 10663 hargch 10664 cygctb 19968 ttac 43791 numinfctb 43858 isnumbasgrplem2 43859 isnumbasabl 43861 iscard4 44287 minregex2 44289 harval3 44292 harval3on 44293 aleph1min 44311 |
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