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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 6421 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴)) | |
| 2 | 1 | simp2bi 1164 | 1 ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 ∅c0 4287 ∪ cuni 4873 Ord word 6361 Lim wlim 6363 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5258 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-tr 5220 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-ord 6365 df-lim 6367 |
| This theorem is referenced by: limuni3 7849 peano1 7886 oe1m 8531 oalimcl 8546 oaass 8547 oarec 8548 omlimcl 8564 odi 8565 oen0 8573 oewordri 8579 oelim2 8582 oeoalem 8583 oeoelem 8585 limensuci 9142 rankxplim2 9853 rankxplim3 9854 r1limwun 10722 constr01 34113 r11 35468 rankfilimbi 35476 omlimcl2 43952 oe0suclim 43987 |
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