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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 9042 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ≈ 𝐴) | |
| 2 | isnumi 10057 | . 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 2147 class class class wbr 5106 dom cdm 5656 Oncon0 6383 ≈ cen 9001 cardccrd 10046 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-pow 5332 ax-pr 5396 ax-un 7778 |
| 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 2102 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-ord 6386 df-on 6387 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-en 9005 df-card 10050 |
| This theorem is used by: oncardval 10066 oncardid 10067 cardnn 10074 iscard 10086 carduni 10092 nnsdomel 10101 harsdom 10106 harsucnn 10109 pm54.43lem 10111 infxpenlem 10122 infxpidm2 10126 onssnum 10149 alephnbtwn 10180 alephnbtwn2 10181 alephordilem1 10182 alephord2 10185 alephsdom 10195 cardaleph 10198 infenaleph 10200 alephinit 10204 iunfictbso 10223 ficardun2 10310 pwsdompw 10311 infunsdom1 10320 ackbij2 10350 cfflb 10367 sdom2en01 10410 fin23lem22 10435 iunctb 10689 alephadd 10692 alephmul 10693 alephexp1 10694 alephsuc3 10695 canthp1lem2 10768 pwfseqlem4a 10776 pwfseqlem4 10777 pwfseqlem5 10778 gchaleph 10786 gchaleph2 10787 hargch 10788 cygctb 20139 j0ltaleph 36021 jltalephlem 36038 jltaleph 36039 ttac 44247 numinfctb 44308 isnumbasgrplem2 44309 isnumbasabl 44311 iscard4 44737 minregex2 44739 harval3 44742 harval3on 44743 aleph1min 44761 |
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