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| Mirrors > Home > MPE Home > Th. List > onssi | Structured version Visualization version GIF version | ||
| Description: An ordinal number is a subset of On. (Contributed by NM, 11-Aug-1994.) |
| Ref | Expression |
|---|---|
| onssi.1 | ⊢ 𝐴 ∈ On |
| Ref | Expression |
|---|---|
| onssi | ⊢ 𝐴 ⊆ On |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | onssi.1 | . 2 ⊢ 𝐴 ∈ On | |
| 2 | onss 7740 | . 2 ⊢ (𝐴 ∈ On → 𝐴 ⊆ On) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐴 ⊆ On |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ⊆ wss 3903 Oncon0 6325 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-ord 6328 df-on 6329 |
| This theorem is referenced by: rankbnd2 9793 dfac12r 10069 cfsmolem 10192 ttukeylem6 10436 |
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