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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 7777 | . 2 ⊢ Ord On | |
| 2 | onn0 6429 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7828 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2772 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6367 | . 2 ⊢ (Lim On ↔ (Ord On ∧ On ≠ ∅ ∧ On = ∪ On)) | |
| 6 | 1, 2, 4, 5 | mpbir3an 1360 | 1 ⊢ Lim On |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ≠ wne 2958 ∅c0 4287 ∪ cuni 4873 Ord word 6361 Oncon0 6362 Lim wlim 6363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-tr 5220 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 |
| This theorem is referenced by: limom 7879 oesuc 8513 limensuc 9143 limsucncmp 36938 dflim5 44039 |
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