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| Mirrors > Home > MPE Home > Th. List > nnord | Structured version Visualization version GIF version | ||
| Description: A natural number is ordinal. (Contributed by NM, 17-Oct-1995.) |
| Ref | Expression |
|---|---|
| nnord | ⊢ (𝐴 ∈ ω → Ord 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnon 7812 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 6321 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 3 | 1, 2 | syl 17 | 1 ⊢ (𝐴 ∈ ω → Ord 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2109 Ord word 6310 Oncon0 6311 ωcom 7806 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1543 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ral 3045 df-rab 3397 df-v 3440 df-ss 3922 df-uni 4862 df-tr 5203 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-ord 6314 df-on 6315 df-om 7807 |
| This theorem is referenced by: nnlim 7820 nnsuc 7824 omsucne 7825 omun 7828 nnaordi 8543 nnaord 8544 nnaword 8552 nnmord 8557 nnmwordi 8560 nnawordex 8562 nnaordex2 8564 omsmo 8583 eldifsucnn 8589 enrefnn 8979 dif1enlemOLD 9081 pssnn 9092 unfi 9095 phplem2 9129 php 9131 php4 9134 nndomog 9137 onomeneq 9138 ominf 9163 ominfOLD 9164 isinf 9165 isinfOLD 9166 dif1ennnALT 9180 findcard3 9187 unblem1 9197 isfinite2 9203 unfilem1 9212 inf3lem5 9547 inf3lem6 9548 cantnfp1lem2 9594 cantnfp1lem3 9595 ttrcltr 9631 ttrclss 9635 dmttrcl 9636 rnttrcl 9637 ttrclselem2 9641 dif1card 9923 nnadju 10111 pwsdompw 10116 ackbij1lem5 10136 ackbij1lem14 10145 ackbij1lem16 10147 ackbij1b 10151 ackbij2 10155 sornom 10190 infpssrlem4 10219 infpssrlem5 10220 fin23lem26 10238 fin23lem23 10239 isf32lem2 10267 isf32lem3 10268 isf32lem4 10269 domtriomlem 10355 axdc3lem2 10364 axdc3lem4 10366 canthp1lem2 10566 elni2 10790 piord 10793 addnidpi 10814 indpi 10820 om2uzf1oi 13879 fzennn 13894 hashp1i 14329 om2noseqf1o 28219 bnj529 34727 bnj1098 34769 bnj570 34891 bnj594 34898 bnj580 34899 bnj967 34931 bnj1001 34945 bnj1053 34962 bnj1071 34963 nnuni 35719 hfun 36171 finminlem 36311 finxpsuclem 37390 finxpsuc 37391 wepwso 43036 dflim5 43322 |
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