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| Mirrors > Home > ILE Home > Th. List > nnon | GIF version | ||
| Description: A natural number is an ordinal number. (Contributed by NM, 27-Jun-1994.) |
| Ref | Expression |
|---|---|
| nnon | ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omelon 4758 | . 2 ⊢ ω ∈ On | |
| 2 | 1 | oneli 4575 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 Oncon0 4510 ωcom 4739 |
| 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 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-iinf 4737 |
| 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 4232 df-iord 4513 df-on 4515 df-suc 4518 df-iom 4740 |
| This theorem is used by: nnoni 4760 nnord 4761 omsson 4762 nnsucpred 4766 nnpredcl 4772 frecrdg 6683 onasuc 6743 onmsuc 6750 nna0 6751 nnm0 6752 nnasuc 6753 nnmsuc 6754 nnsucelsuc 6768 nnsucsssuc 6769 nntri2or2 6775 nntr2 6780 nnaordi 6785 nnaword1 6790 nnaordex 6805 phpelm 7172 phplem4on 7173 omp1eomlem 7440 finnum 7534 pion 7683 prarloclemlo 7867 nninfctlemfo 12842 ennnfonelemk 13349 pwle2 17233 |
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