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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 4581 | . 2 | |
2 | eloni 4347 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wcel 2135 word 4334 con0 4335 com 4561 |
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 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-nul 4102 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-iinf 4559 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-v 2723 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-nul 3405 df-pw 3555 df-sn 3576 df-pr 3577 df-uni 3784 df-int 3819 df-tr 4075 df-iord 4338 df-on 4340 df-suc 4343 df-iom 4562 |
This theorem is referenced by: nnsucsssuc 6451 nnsucuniel 6454 nntri1 6455 nnsseleq 6460 nntr2 6462 phplem1 6809 phplem2 6810 phplem3 6811 phplem4 6812 phplem4dom 6819 nndomo 6821 dif1en 6836 nnwetri 6872 unsnfi 6875 ctmlemr 7064 nnnninf 7081 nnnninfeq 7083 nnnninfeq2 7084 nninfisol 7088 piord 7243 addnidpig 7268 archnqq 7349 frecfzennn 10351 hashp1i 10712 ennnfonelemk 12270 ennnfonelemg 12273 ennnfonelemhf1o 12283 ennnfonelemhom 12285 ctinfom 12298 nnsf 13719 peano4nninf 13720 nninfsellemeq 13728 |
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