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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 7604 | . 2 ⊢ Ord On | |
2 | onn0 6315 | . 2 ⊢ On ≠ ∅ | |
3 | unon 7653 | . . 3 ⊢ ∪ On = On | |
4 | 3 | eqcomi 2747 | . 2 ⊢ On = ∪ On |
5 | df-lim 6256 | . 2 ⊢ (Lim On ↔ (Ord On ∧ On ≠ ∅ ∧ On = ∪ On)) | |
6 | 1, 2, 4, 5 | mpbir3an 1339 | 1 ⊢ Lim On |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1539 ≠ wne 2942 ∅c0 4253 ∪ cuni 4836 Ord word 6250 Oncon0 6251 Lim wlim 6252 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-11 2156 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-tr 5188 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 |
This theorem is referenced by: limom 7703 oesuc 8319 limensuc 8890 limsucncmp 34562 |
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