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| Mirrors > Home > MPE Home > Th. List > 0ellim | Structured version Visualization version GIF version | ||
| Description: A limit ordinal contains the empty set. (Contributed by NM, 15-May-1994.) |
| Ref | Expression |
|---|---|
| 0ellim | ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dflim2 6364 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴)) | |
| 2 | 1 | simp2bi 1146 | 1 ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2111 ∅c0 4283 ∪ cuni 4859 Ord word 6305 Lim wlim 6307 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-tr 5199 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-we 5571 df-ord 6309 df-lim 6311 |
| This theorem is referenced by: limuni3 7782 peano1 7819 oe1m 8460 oalimcl 8475 oaass 8476 oarec 8477 omlimcl 8493 odi 8494 oen0 8501 oewordri 8507 oelim2 8510 oeoalem 8511 oeoelem 8513 limensuci 9066 rankxplim2 9773 rankxplim3 9774 r1limwun 10627 constr01 33753 r11 35103 rankfilimbi 35110 omlimcl2 43281 oe0suclim 43316 |
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