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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 7871 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 6371 | . 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 6360 Oncon0 6361 ωcom 7865 |
| 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 2734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rab 3415 df-v 3455 df-ss 3919 df-uni 4871 df-tr 5217 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-ord 6364 df-on 6365 df-om 7866 |
| This theorem is used by: nnlim 7879 nnsuc 7883 omsucne 7884 omun 7887 nnaordi 8609 nnaord 8610 nnaword 8618 nnmord 8623 nnmwordi 8626 nnawordex 8628 nnaordex2 8630 omsmo 8649 eldifsucnn 8655 enrefnn 9056 pssnn 9166 unfi 9168 phplem2 9202 php 9204 php4 9207 nndomog 9210 onomeneq 9211 ominf 9237 isinf 9238 dif1ennnALT 9250 findcard3 9256 unblem1 9265 isfinite2 9271 unfilem1 9278 inf3lem5 9614 inf3lem6 9615 cantnfp1lem2 9661 cantnfp1lem3 9662 ttrcltr 9698 ttrclss 9702 dmttrcl 9703 rnttrcl 9704 ttrclselem2 9708 dif1card 10016 nnadju 10203 pwsdompw 10208 ackbij1lem5 10228 ackbij1lem14 10237 ackbij1lem16 10239 ackbij1b 10243 ackbij2 10247 sornom 10282 infpssrlem4 10311 infpssrlem5 10312 fin23lem26 10330 fin23lem23 10331 isf32lem2 10359 isf32lem3 10360 isf32lem4 10361 domtriomlem 10447 axdc3lem2 10456 axdc3lem4 10458 canthp1lem2 10665 elni2 10889 piord 10892 addnidpi 10913 indpi 10919 om2uzf1oi 14019 fzennn 14034 hashp1i 14469 om2noseqf1o 28564 bnj529 35238 bnj1098 35280 bnj570 35401 bnj594 35408 bnj580 35409 bnj967 35441 bnj1001 35455 bnj1053 35472 bnj1071 35473 fineqvnttrclselem2 35635 fineqvnttrclselem3 35636 nnuni 36293 hfun 36745 finminlem 36924 mh-inf3f1 37147 finxpsuclem 38138 finxpsuc 38139 wepwso 43871 dflim5 44157 hashnnlt 45832 |
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