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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 7724 | . 2 ⊢ Ord On | |
| 2 | onn0 6383 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7775 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2746 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6322 | . 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 4274 ∪ cuni 4851 Ord word 6316 Oncon0 6317 Lim wlim 6318 |
| 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 5231 ax-nul 5241 ax-pr 5370 ax-un 7682 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-tr 5194 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 |
| This theorem is referenced by: limom 7826 oesuc 8455 limensuc 9085 limsucncmp 36644 dflim5 43775 |
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