| Mathbox for BJ |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-nnelon | GIF version | ||
| Description: A natural number is an ordinal. Constructive proof of nnon 4738. Can also be proved from bj-omssonALT 16874. (Contributed by BJ, 27-Oct-2020.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-nnelon | ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bj-nnord 16869 | . 2 ⊢ (𝐴 ∈ ω → Ord 𝐴) | |
| 2 | elong 4500 | . 2 ⊢ (𝐴 ∈ ω → (𝐴 ∈ On ↔ Ord 𝐴)) | |
| 3 | 1, 2 | mpbird 167 | 1 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2205 Ord word 4489 Oncon0 4490 ωcom 4718 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-nul 4242 ax-pr 4328 ax-un 4560 ax-bd0 16724 ax-bdor 16727 ax-bdal 16729 ax-bdex 16730 ax-bdeq 16731 ax-bdel 16732 ax-bdsb 16733 ax-bdsep 16795 ax-infvn 16852 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-sn 3701 df-pr 3702 df-uni 3921 df-int 3956 df-tr 4215 df-iord 4493 df-on 4495 df-suc 4498 df-iom 4719 df-bdc 16752 df-bj-ind 16838 |
| This theorem is referenced by: bj-omsson 16873 |
| Copyright terms: Public domain | W3C validator |