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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 7867 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 6362 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ (𝐴 ∈ ω → Ord 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 Ord word 6351 Oncon0 6352 ωcom 7861 |
| 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-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rab 3413 df-v 3452 df-ss 3916 df-uni 4868 df-tr 5213 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-ord 6355 df-on 6356 df-om 7862 |
| This theorem is used by: nnlim 7875 nnsuc 7879 omsucne 7880 omun 7883 nnaordi 8606 nnaord 8607 nnaword 8615 nnmord 8620 nnmwordi 8623 nnawordex 8625 nnaordex2 8627 omsmo 8646 eldifsucnn 8652 enrefnn 9053 pssnn 9163 unfi 9165 phplem2 9199 php 9201 php4 9204 nndomog 9207 onomeneq 9208 ominf 9234 isinf 9235 dif1ennnALT 9247 findcard3 9253 unblem1 9262 isfinite2 9268 unfilem1 9275 inf3lem5 9611 inf3lem6 9612 cantnfp1lem2 9658 cantnfp1lem3 9659 ttrcltr 9695 ttrclss 9699 dmttrcl 9700 rnttrcl 9701 ttrclselem2 9705 hfun 9879 dif1card 10046 nnadju 10233 pwsdompw 10238 ackbij1lem5 10258 ackbij1lem14 10267 ackbij1lem16 10269 ackbij1b 10273 ackbij2 10277 sornom 10312 infpssrlem4 10341 infpssrlem5 10342 fin23lem26 10360 fin23lem23 10361 isf32lem2 10389 isf32lem3 10390 isf32lem4 10391 domtriomlem 10477 axdc3lem2 10486 axdc3lem4 10488 canthp1lem2 10695 elni2 10919 piord 10922 addnidpi 10943 indpi 10949 om2uzf1oi 14050 fzennn 14065 hashp1i 14500 om2noseqf1o 28606 bnj529 35292 bnj1098 35334 bnj570 35455 bnj594 35462 bnj580 35463 bnj967 35495 bnj1001 35509 bnj1053 35526 bnj1071 35527 fineqvnttrclselem2 35709 fineqvnttrclselem3 35710 nnuni 36407 finminlem 37022 mh-inf3f1 37245 finxpsuclem 38234 finxpsuc 38235 wepwso 43982 dflim5 44268 hashnnlt 45943 |
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