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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 7789 | . 2 ⊢ Ord On | |
| 2 | onn0 6428 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7840 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2770 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6366 | . 2 ⊢ (Lim On ↔ (Ord On ∧ On ≠ ∅ ∧ On = ∪ On)) | |
| 6 | 1, 2, 4, 5 | mpbir3an 1360 | 1 ⊢ Lim On |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ≠ wne 2956 ∅c0 4279 ∪ cuni 4867 Ord word 6360 Oncon0 6361 Lim wlim 6362 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7749 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-tr 5213 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 |
| This theorem is used by: limom 7891 oesuc 8528 limensuc 9166 limsucncmp 37214 dflim5 44315 |
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