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| Mirrors > Home > ILE Home > Th. List > nnon | Unicode version | ||
| Description: A natural number is an ordinal number. (Contributed by NM, 27-Jun-1994.) |
| Ref | Expression |
|---|---|
| nnon |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omelon 4756 |
. 2
| |
| 2 | 1 | oneli 4573 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-iinf 4735 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3715 df-pr 3716 df-uni 3936 df-int 3971 df-tr 4230 df-iord 4511 df-on 4513 df-suc 4516 df-iom 4738 |
| This theorem is used by: nnoni 4758 nnord 4759 omsson 4760 nnsucpred 4764 nnpredcl 4770 frecrdg 6679 onasuc 6739 onmsuc 6746 nna0 6747 nnm0 6748 nnasuc 6749 nnmsuc 6750 nnsucelsuc 6764 nnsucsssuc 6765 nntri2or2 6771 nntr2 6776 nnaordi 6781 nnaword1 6786 nnaordex 6801 phpelm 7168 phplem4on 7169 omp1eomlem 7434 finnum 7528 pion 7677 prarloclemlo 7861 nninfctlemfo 12817 ennnfonelemk 13291 pwle2 17028 |
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