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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 4751 | . 2 ⊢ ω ∈ On | |
| 2 | 1 | oneli 4568 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2209 Oncon0 4503 ωcom 4732 |
| This theorem was proved from 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 4244 ax-nul 4254 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-iinf 4730 |
| This theorem 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 3687 df-sn 3711 df-pr 3712 df-uni 3931 df-int 3966 df-tr 4225 df-iord 4506 df-on 4508 df-suc 4511 df-iom 4733 |
| This theorem is referenced by: nnoni 4753 nnord 4754 omsson 4755 nnsucpred 4759 nnpredcl 4765 frecrdg 6669 onasuc 6729 onmsuc 6736 nna0 6737 nnm0 6738 nnasuc 6739 nnmsuc 6740 nnsucelsuc 6754 nnsucsssuc 6755 nntri2or2 6761 nntr2 6766 nnaordi 6771 nnaword1 6776 nnaordex 6791 phpelm 7158 phplem4on 7159 omp1eomlem 7424 finnum 7518 pion 7667 prarloclemlo 7851 nninfctlemfo 12795 ennnfonelemk 13269 pwle2 16942 |
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