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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 4707 | . 2 ⊢ ω ∈ On | |
| 2 | 1 | oneli 4525 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2202 Oncon0 4460 ωcom 4688 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-iinf 4686 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-uni 3894 df-int 3929 df-tr 4188 df-iord 4463 df-on 4465 df-suc 4468 df-iom 4689 |
| This theorem is referenced by: nnoni 4709 nnord 4710 omsson 4711 nnsucpred 4715 nnpredcl 4721 frecrdg 6574 onasuc 6634 onmsuc 6641 nna0 6642 nnm0 6643 nnasuc 6644 nnmsuc 6645 nnsucelsuc 6659 nnsucsssuc 6660 nntri2or2 6666 nntr2 6671 nnaordi 6676 nnaword1 6681 nnaordex 6696 phpelm 7053 phplem4on 7054 omp1eomlem 7293 finnum 7387 pion 7530 prarloclemlo 7714 nninfctlemfo 12616 ennnfonelemk 13026 pwle2 16625 |
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