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Mirrors > Home > ILE Home > Th. List > nnord | Unicode version |
Description: A natural number is ordinal. (Contributed by NM, 17-Oct-1995.) |
Ref | Expression |
---|---|
nnord |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnon 4587 | . 2 | |
2 | eloni 4353 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wcel 2136 word 4340 con0 4341 com 4567 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-iinf 4565 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-pw 3561 df-sn 3582 df-pr 3583 df-uni 3790 df-int 3825 df-tr 4081 df-iord 4344 df-on 4346 df-suc 4349 df-iom 4568 |
This theorem is referenced by: nnsucsssuc 6460 nnsucuniel 6463 nntri1 6464 nnsseleq 6469 nntr2 6471 phplem1 6818 phplem2 6819 phplem3 6820 phplem4 6821 phplem4dom 6828 nndomo 6830 dif1en 6845 nnwetri 6881 unsnfi 6884 ctmlemr 7073 nnnninf 7090 nnnninfeq 7092 nnnninfeq2 7093 nninfisol 7097 piord 7252 addnidpig 7277 archnqq 7358 frecfzennn 10361 hashp1i 10723 ennnfonelemk 12333 ennnfonelemg 12336 ennnfonelemhf1o 12346 ennnfonelemhom 12348 ctinfom 12361 nnsf 13885 peano4nninf 13886 nninfsellemeq 13894 |
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