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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 6416 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴)) | |
| 2 | 1 | simp2bi 1162 | 1 ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 ∅c0 4294 ∪ cuni 4873 Ord word 6356 Lim wlim 6358 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5258 ax-pr 5402 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-opab 5175 df-tr 5220 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-ord 6360 df-lim 6362 |
| This theorem is referenced by: limuni3 7844 peano1 7881 oe1m 8526 oalimcl 8541 oaass 8542 oarec 8543 omlimcl 8559 odi 8560 oen0 8568 oewordri 8574 oelim2 8577 oeoalem 8578 oeoelem 8580 limensuci 9137 rankxplim2 9848 rankxplim3 9849 r1limwun 10717 constr01 34073 r11 35426 rankfilimbi 35433 omlimcl2 43854 oe0suclim 43889 |
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