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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 6399 | . 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴)) | |
| 2 | 1 | simp2bi 1158 | 1 ⊢ (Lim 𝐴 → ∅ ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 ∅c0 4283 ∪ cuni 4862 Ord word 6340 Lim wlim 6342 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 ax-sep 5243 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-tr 5205 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-ord 6344 df-lim 6346 |
| This theorem is referenced by: limuni3 7827 peano1 7864 oe1m 8508 oalimcl 8523 oaass 8524 oarec 8525 omlimcl 8541 odi 8542 oen0 8550 oewordri 8556 oelim2 8559 oeoalem 8560 oeoelem 8562 limensuci 9119 rankxplim2 9832 rankxplim3 9833 r1limwun 10688 constr01 34000 r11 35351 rankfilimbi 35358 omlimcl2 43780 oe0suclim 43815 |
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