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Mirrors > Home > ILE Home > Th. List > limom | Unicode version |
Description: Omega is a limit ordinal. Theorem 2.8 of [BellMachover] p. 473. (Contributed by NM, 26-Mar-1995.) (Proof rewritten by Jim Kingdon, 5-Jan-2019.) |
Ref | Expression |
---|---|
limom |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordom 4347 | . 2 | |
2 | peano1 4335 | . 2 | |
3 | vex 2604 | . . . . . . . . 9 | |
4 | 3 | sucex 4243 | . . . . . . . 8 |
5 | 4 | isseti 2607 | . . . . . . 7 |
6 | peano2 4336 | . . . . . . . . 9 | |
7 | 3 | sucid 4172 | . . . . . . . . 9 |
8 | 6, 7 | jctil 305 | . . . . . . . 8 |
9 | eleq2 2142 | . . . . . . . . 9 | |
10 | eleq1 2141 | . . . . . . . . 9 | |
11 | 9, 10 | anbi12d 456 | . . . . . . . 8 |
12 | 8, 11 | syl5ibr 154 | . . . . . . 7 |
13 | 5, 12 | eximii 1533 | . . . . . 6 |
14 | 13 | 19.37aiv 1605 | . . . . 5 |
15 | eluni 3604 | . . . . 5 | |
16 | 14, 15 | sylibr 132 | . . . 4 |
17 | 16 | ssriv 3003 | . . 3 |
18 | orduniss 4180 | . . . 4 | |
19 | 1, 18 | ax-mp 7 | . . 3 |
20 | 17, 19 | eqssi 3015 | . 2 |
21 | dflim2 4125 | . 2 | |
22 | 1, 2, 20, 21 | mpbir3an 1120 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wceq 1284 wex 1421 wcel 1433 wss 2973 c0 3251 cuni 3601 word 4117 wlim 4119 csuc 4120 com 4331 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 576 ax-in2 577 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-13 1444 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-nul 3904 ax-pow 3948 ax-pr 3964 ax-un 4188 ax-iinf 4329 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-dif 2975 df-un 2977 df-in 2979 df-ss 2986 df-nul 3252 df-pw 3384 df-sn 3404 df-pr 3405 df-uni 3602 df-int 3637 df-tr 3876 df-iord 4121 df-ilim 4124 df-suc 4126 df-iom 4332 |
This theorem is referenced by: (None) |
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