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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 6383 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴)) | |
| 2 | 1 | simp2bi 1147 | 1 ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ∅c0 4287 ∪ cuni 4865 Ord word 6324 Lim wlim 6326 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-tr 5208 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-ord 6328 df-lim 6330 |
| This theorem is referenced by: limuni3 7804 peano1 7841 oe1m 8482 oalimcl 8497 oaass 8498 oarec 8499 omlimcl 8515 odi 8516 oen0 8524 oewordri 8530 oelim2 8533 oeoalem 8534 oeoelem 8536 limensuci 9093 rankxplim2 9804 rankxplim3 9805 r1limwun 10659 constr01 33919 r11 35269 rankfilimbi 35276 omlimcl2 43596 oe0suclim 43631 |
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