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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 4701 | . 2 ⊢ ω ∈ On | |
| 2 | 1 | oneli 4519 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 Oncon0 4454 ωcom 4682 |
| 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 4202 ax-nul 4210 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-iinf 4680 |
| 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 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-uni 3889 df-int 3924 df-tr 4183 df-iord 4457 df-on 4459 df-suc 4462 df-iom 4683 |
| This theorem is referenced by: nnoni 4703 nnord 4704 omsson 4705 nnsucpred 4709 nnpredcl 4715 frecrdg 6560 onasuc 6620 onmsuc 6627 nna0 6628 nnm0 6629 nnasuc 6630 nnmsuc 6631 nnsucelsuc 6645 nnsucsssuc 6646 nntri2or2 6652 nntr2 6657 nnaordi 6662 nnaword1 6667 nnaordex 6682 phpelm 7036 phplem4on 7037 omp1eomlem 7272 finnum 7366 pion 7508 prarloclemlo 7692 nninfctlemfo 12576 ennnfonelemk 12986 pwle2 16423 |
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