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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 4411 | . 2 | |
2 | en2lp 4464 | . . . . . . . . . 10 | |
3 | eleq1 2200 | . . . . . . . . . . . . 13 | |
4 | 3 | biimpac 296 | . . . . . . . . . . . 12 |
5 | 4 | anim2i 339 | . . . . . . . . . . 11 |
6 | 5 | expr 372 | . . . . . . . . . 10 |
7 | 2, 6 | mtoi 653 | . . . . . . . . 9 |
8 | 7 | adantl 275 | . . . . . . . 8 |
9 | elelsuc 4326 | . . . . . . . . . . . . . . 15 | |
10 | 9 | adantr 274 | . . . . . . . . . . . . . 14 |
11 | ordelss 4296 | . . . . . . . . . . . . . 14 | |
12 | 10, 11 | sylan2 284 | . . . . . . . . . . . . 13 |
13 | 12 | sseld 3091 | . . . . . . . . . . . 12 |
14 | 13 | expr 372 | . . . . . . . . . . 11 |
15 | 14 | pm2.43d 50 | . . . . . . . . . 10 |
16 | 15 | impr 376 | . . . . . . . . 9 |
17 | elsuci 4320 | . . . . . . . . 9 | |
18 | 16, 17 | syl 14 | . . . . . . . 8 |
19 | 8, 18 | ecased 1327 | . . . . . . 7 |
20 | 19 | ancom2s 555 | . . . . . 6 |
21 | 20 | ex 114 | . . . . 5 |
22 | 21 | alrimivv 1847 | . . . 4 |
23 | dftr2 4023 | . . . 4 | |
24 | 22, 23 | sylibr 133 | . . 3 |
25 | sssucid 4332 | . . . 4 | |
26 | trssord 4297 | . . . 4 | |
27 | 25, 26 | mp3an2 1303 | . . 3 |
28 | 24, 27 | mpancom 418 | . 2 |
29 | 1, 28 | impbii 125 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wb 104 wo 697 wal 1329 wceq 1331 wcel 1480 wss 3066 wtr 4021 word 4279 csuc 4282 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-setind 4447 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-sn 3528 df-pr 3529 df-uni 3732 df-tr 4022 df-iord 4283 df-suc 4288 |
This theorem is referenced by: nlimsucg 4476 ordpwsucss 4477 |
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