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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 7883 | . 2 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
| 2 | eloni 6372 | . 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 2144 Ord word 6361 Oncon0 6362 ωcom 7877 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rab 3413 df-v 3452 df-ss 3896 df-uni 4867 df-tr 5212 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-ord 6365 df-on 6366 df-om 7878 |
| This theorem is used by: nnlim 7891 nnsuc 7895 omsucne 7896 omun 7899 nnaordi 8627 nnaord 8628 nnaword 8636 nnmord 8641 nnmwordi 8644 nnawordex 8646 nnaordex2 8648 omsmo 8667 eldifsucnn 8673 enrefnn 9074 pssnn 9184 unfi 9186 phplem2 9220 php 9222 php4 9225 nndomog 9228 onomeneq 9229 ominf 9255 isinf 9256 dif1ennnALT 9268 findcard3 9274 unblem1 9284 isfinite2 9290 unfilem1 9297 inf3lem5 9633 inf3lem6 9634 cantnfp1lem2 9680 cantnfp1lem3 9681 ttrcltr 9717 ttrclss 9721 dmttrcl 9722 rnttrcl 9723 ttrclselem2 9727 hfunOLD 9919 dif1card 10089 nnadju 10276 pwsdompw 10281 ackbij1lem5 10301 ackbij1lem14 10310 ackbij1lem16 10312 ackbij1b 10316 ackbij2 10320 sornom 10355 infpssrlem4 10384 infpssrlem5 10385 fin23lem26 10403 fin23lem23 10404 isf32lem2 10432 isf32lem3 10433 isf32lem4 10434 domtriomlem 10520 axdc3lem2 10529 axdc3lem4 10531 canthp1lem2 10738 elni2 10962 piord 10965 addnidpi 10986 indpi 10992 om2uzf1oi 14096 fzennn 14111 hashp1i 14547 om2noseqf1o 28687 bnj529 35372 bnj1098 35414 bnj570 35535 bnj594 35542 bnj580 35543 bnj967 35575 bnj1001 35589 bnj1053 35606 bnj1071 35607 fineqvnttrclselem2 35790 fineqvnttrclselem3 35791 nnuni 36492 finminlem 37106 mh-inf3f1 37329 finxpsuclem 38321 finxpsuc 38322 wepwso 44050 dflim5 44331 hashnnlt 46012 |
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