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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 4705 | . 2 ⊢ ω ∈ On | |
| 2 | 1 | oneli 4523 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 Oncon0 4458 ωcom 4686 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-iinf 4684 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-pw 3652 df-sn 3673 df-pr 3674 df-uni 3892 df-int 3927 df-tr 4186 df-iord 4461 df-on 4463 df-suc 4466 df-iom 4687 |
| This theorem is referenced by: nnoni 4707 nnord 4708 omsson 4709 nnsucpred 4713 nnpredcl 4719 frecrdg 6569 onasuc 6629 onmsuc 6636 nna0 6637 nnm0 6638 nnasuc 6639 nnmsuc 6640 nnsucelsuc 6654 nnsucsssuc 6655 nntri2or2 6661 nntr2 6666 nnaordi 6671 nnaword1 6676 nnaordex 6691 phpelm 7048 phplem4on 7049 omp1eomlem 7284 finnum 7378 pion 7520 prarloclemlo 7704 nninfctlemfo 12601 ennnfonelemk 13011 pwle2 16535 |
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