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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 8995 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 10008 | . 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 5103 dom cdm 5651 Oncon0 6355 ≈ cen 8954 cardccrd 9997 |
| 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 2213 ax-ext 2733 ax-sep 5249 ax-pow 5327 ax-pr 5391 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 2565 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6358 df-on 6359 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-en 8958 df-card 10001 |
| This theorem is used by: oncardval 10017 oncardid 10018 cardnn 10025 iscard 10037 carduni 10043 nnsdomel 10052 harsdom 10057 harsucnn 10060 pm54.43lem 10062 infxpenlem 10073 infxpidm2 10077 onssnum 10100 alephnbtwn 10131 alephnbtwn2 10132 alephordilem1 10133 alephord2 10136 alephsdom 10146 cardaleph 10149 infenaleph 10151 alephinit 10155 iunfictbso 10174 ficardun2 10261 pwsdompw 10262 infunsdom1 10271 ackbij2 10301 cfflb 10318 sdom2en01 10361 fin23lem22 10386 iunctb 10640 alephadd 10643 alephmul 10644 alephexp1 10645 alephsuc3 10646 canthp1lem2 10719 pwfseqlem4a 10727 pwfseqlem4 10728 pwfseqlem5 10729 gchaleph 10737 gchaleph2 10738 hargch 10739 cygctb 20086 ttac 43996 numinfctb 44063 isnumbasgrplem2 44064 isnumbasabl 44066 iscard4 44492 minregex2 44494 harval3 44497 harval3on 44498 aleph1min 44516 |
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