| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 2ssom | GIF version | ||
| Description: The ordinal 2 is included in the set of natural number ordinals. (Contributed by BJ, 5-Aug-2024.) |
| Ref | Expression |
|---|---|
| 2ssom | ⊢ 2o ⊆ ω |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2onn 6588 | . 2 ⊢ 2o ∈ ω | |
| 2 | elomssom 4642 | . 2 ⊢ (2o ∈ ω → 2o ⊆ ω) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 2o ⊆ ω |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2167 ⊆ wss 3157 ωcom 4627 2oc2o 6477 |
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-nul 4160 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-iinf 4625 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-v 2765 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3452 df-pw 3608 df-sn 3629 df-pr 3630 df-uni 3841 df-int 3876 df-suc 4407 df-iom 4628 df-1o 6483 df-2o 6484 |
| This theorem is referenced by: nninfwlporlemd 7247 nninfwlporlem 7248 nninfwlpoimlemg 7250 nninfwlpoimlemginf 7251 nninfctlemfo 12232 bj-charfunbi 15541 2omap 15726 |
| Copyright terms: Public domain | W3C validator |