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Mirrors > Home > ILE Home > Th. List > ordsuc | Unicode version |
Description: The successor of an ordinal class is ordinal. (Contributed by NM, 3-Apr-1995.) (Constructive proof by Mario Carneiro and Jim Kingdon, 20-Jul-2019.) |
Ref | Expression |
---|---|
ordsuc |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordsucim 4244 | . 2 | |
2 | en2lp 4297 | . . . . . . . . . 10 | |
3 | eleq1 2141 | . . . . . . . . . . . . 13 | |
4 | 3 | biimpac 292 | . . . . . . . . . . . 12 |
5 | 4 | anim2i 334 | . . . . . . . . . . 11 |
6 | 5 | expr 367 | . . . . . . . . . 10 |
7 | 2, 6 | mtoi 622 | . . . . . . . . 9 |
8 | 7 | adantl 271 | . . . . . . . 8 |
9 | elelsuc 4164 | . . . . . . . . . . . . . . 15 | |
10 | 9 | adantr 270 | . . . . . . . . . . . . . 14 |
11 | ordelss 4134 | . . . . . . . . . . . . . 14 | |
12 | 10, 11 | sylan2 280 | . . . . . . . . . . . . 13 |
13 | 12 | sseld 2998 | . . . . . . . . . . . 12 |
14 | 13 | expr 367 | . . . . . . . . . . 11 |
15 | 14 | pm2.43d 49 | . . . . . . . . . 10 |
16 | 15 | impr 371 | . . . . . . . . 9 |
17 | elsuci 4158 | . . . . . . . . 9 | |
18 | 16, 17 | syl 14 | . . . . . . . 8 |
19 | 8, 18 | ecased 1280 | . . . . . . 7 |
20 | 19 | ancom2s 530 | . . . . . 6 |
21 | 20 | ex 113 | . . . . 5 |
22 | 21 | alrimivv 1796 | . . . 4 |
23 | dftr2 3877 | . . . 4 | |
24 | 22, 23 | sylibr 132 | . . 3 |
25 | sssucid 4170 | . . . 4 | |
26 | trssord 4135 | . . . 4 | |
27 | 25, 26 | mp3an2 1256 | . . 3 |
28 | 24, 27 | mpancom 413 | . 2 |
29 | 1, 28 | impbii 124 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 102 wb 103 wo 661 wal 1282 wceq 1284 wcel 1433 wss 2973 wtr 3875 word 4117 csuc 4120 |
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-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-setind 4280 |
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-sn 3404 df-pr 3405 df-uni 3602 df-tr 3876 df-iord 4121 df-suc 4126 |
This theorem is referenced by: nlimsucg 4309 ordpwsucss 4310 |
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