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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 7778 | . 2 ⊢ Ord On | |
| 2 | onn0 6431 | . 2 ⊢ On ≠ ∅ | |
| 3 | unon 7829 | . . 3 ⊢ ∪ On = On | |
| 4 | 3 | eqcomi 2774 | . 2 ⊢ On = ∪ On |
| 5 | df-lim 6369 | . 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 2960 ∅c0 4286 ∪ cuni 4874 Ord word 6363 Oncon0 6364 Lim wlim 6365 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 ax-un 7738 |
| 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 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-tr 5221 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 |
| This theorem is used by: limom 7880 oesuc 8514 limensuc 9145 limsucncmp 36990 dflim5 44089 |
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