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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 7710 | . 2 ⊢ Ord On | |
| 2 | onn0 6372 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7761 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2740 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6311 | . 2 ⊢ (Lim On ↔ (Ord On ∧ On ≠ ∅ ∧ On = ∪ On)) | |
| 6 | 1, 2, 4, 5 | mpbir3an 1342 | 1 ⊢ Lim On |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ≠ wne 2928 ∅c0 4283 ∪ cuni 4859 Ord word 6305 Oncon0 6306 Lim wlim 6307 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pr 5370 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-tr 5199 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-we 5571 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 |
| This theorem is referenced by: limom 7812 oesuc 8442 limensuc 9067 limsucncmp 36479 dflim5 43361 |
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