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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 7904 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 6387 | . 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 2147 Ord word 6376 Oncon0 6377 ωcom 7898 |
| 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-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rab 3417 df-v 3456 df-ss 3901 df-uni 4871 df-tr 5216 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-ord 6380 df-on 6381 df-om 7899 |
| This theorem is used by: nnlim 7912 nnsuc 7916 omsucne 7917 omun 7920 nnaordi 8652 nnaord 8653 nnaword 8661 nnmord 8666 nnmwordi 8669 nnawordex 8671 nnaordex2 8673 omsmo 8692 eldifsucnn 8698 enrefnn 9099 pssnn 9209 unfi 9211 phplem2 9245 php 9247 php4 9250 nndomog 9253 onomeneq 9254 ominf 9280 isinf 9281 dif1ennnALT 9293 findcard3 9299 unblem1 9309 isfinite2 9315 unfilem1 9322 inf3lem5 9657 inf3lem6 9658 cantnfp1lem2 9704 cantnfp1lem3 9705 ttrcltr 9741 ttrclss 9745 dmttrcl 9746 rnttrcl 9747 ttrclselem2 9751 hfunOLD 9943 dif1card 10113 nnadju 10300 pwsdompw 10305 ackbij1lem5 10325 ackbij1lem14 10334 ackbij1lem16 10336 ackbij1b 10340 ackbij2 10344 sornom 10379 infpssrlem4 10408 infpssrlem5 10409 fin23lem26 10427 fin23lem23 10428 isf32lem2 10456 isf32lem3 10457 isf32lem4 10458 domtriomlem 10544 axdc3lem2 10553 axdc3lem4 10555 canthp1lem2 10762 elni2 10986 piord 10989 addnidpi 11010 indpi 11016 om2uzf1oi 14120 fzennn 14135 hashp1i 14571 om2noseqf1o 28714 bnj529 35439 bnj1098 35481 bnj570 35602 bnj594 35609 bnj580 35610 bnj967 35642 bnj1001 35656 bnj1053 35673 bnj1071 35674 fineqvnttrclselem2 35889 fineqvnttrclselem3 35890 nnuni 36669 finminlem 37283 mh-inf3f1 37506 finxpsuclem 38511 finxpsuc 38512 wepwso 44241 dflim5 44521 hashnnlt 46205 |
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