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| Mirrors > Home > MPE Home > Th. List > limon | Structured version Visualization version GIF version | ||
| Description: The class of ordinal numbers is a limit ordinal. (Contributed by NM, 24-Mar-1995.) |
| Ref | Expression |
|---|---|
| limon | ⊢ Lim On |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordon 7732 | . 2 ⊢ Ord On | |
| 2 | onn0 6391 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7783 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2746 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6330 | . 2 ⊢ (Lim On ↔ (Ord On ∧ On ≠ ∅ ∧ On = ∪ On)) | |
| 6 | 1, 2, 4, 5 | mpbir3an 1343 | 1 ⊢ Lim On |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ≠ wne 2933 ∅c0 4287 ∪ cuni 4865 Ord word 6324 Oncon0 6325 Lim wlim 6326 |
| 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-nul 5253 ax-pr 5379 ax-un 7690 |
| 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 df-lim 6330 df-suc 6331 |
| This theorem is referenced by: limom 7834 oesuc 8464 limensuc 9094 limsucncmp 36659 dflim5 43680 |
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