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Mirrors > Home > ILE Home > Th. List > ordsoexmid | Unicode version |
Description: Weak linearity of ordinals implies the law of the excluded middle (that is, decidability of an arbitrary proposition). (Contributed by Mario Carneiro and Jim Kingdon, 29-Jan-2019.) |
Ref | Expression |
---|---|
ordsoexmid.1 |
Ref | Expression |
---|---|
ordsoexmid |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordtriexmidlem 4263 | . . . . 5 | |
2 | 1 | elexi 2611 | . . . 4 |
3 | 2 | sucid 4172 | . . 3 |
4 | 1 | onsuci 4260 | . . . 4 |
5 | suc0 4166 | . . . . 5 | |
6 | 0elon 4147 | . . . . . 6 | |
7 | 6 | onsuci 4260 | . . . . 5 |
8 | 5, 7 | eqeltrri 2152 | . . . 4 |
9 | eleq1 2141 | . . . . . . 7 | |
10 | 9 | 3anbi1d 1247 | . . . . . 6 |
11 | eleq1 2141 | . . . . . . 7 | |
12 | eleq1 2141 | . . . . . . . 8 | |
13 | 12 | orbi1d 737 | . . . . . . 7 |
14 | 11, 13 | imbi12d 232 | . . . . . 6 |
15 | 10, 14 | imbi12d 232 | . . . . 5 |
16 | 4 | elexi 2611 | . . . . . 6 |
17 | eleq1 2141 | . . . . . . . 8 | |
18 | 17 | 3anbi2d 1248 | . . . . . . 7 |
19 | eleq2 2142 | . . . . . . . 8 | |
20 | eleq2 2142 | . . . . . . . . 9 | |
21 | 20 | orbi2d 736 | . . . . . . . 8 |
22 | 19, 21 | imbi12d 232 | . . . . . . 7 |
23 | 18, 22 | imbi12d 232 | . . . . . 6 |
24 | p0ex 3959 | . . . . . . 7 | |
25 | eleq1 2141 | . . . . . . . . 9 | |
26 | 25 | 3anbi3d 1249 | . . . . . . . 8 |
27 | eleq2 2142 | . . . . . . . . . 10 | |
28 | eleq1 2141 | . . . . . . . . . 10 | |
29 | 27, 28 | orbi12d 739 | . . . . . . . . 9 |
30 | 29 | imbi2d 228 | . . . . . . . 8 |
31 | 26, 30 | imbi12d 232 | . . . . . . 7 |
32 | ordsoexmid.1 | . . . . . . . . . . 11 | |
33 | df-iso 4052 | . . . . . . . . . . 11 | |
34 | 32, 33 | mpbi 143 | . . . . . . . . . 10 |
35 | 34 | simpri 111 | . . . . . . . . 9 |
36 | epel 4047 | . . . . . . . . . . . 12 | |
37 | epel 4047 | . . . . . . . . . . . . 13 | |
38 | epel 4047 | . . . . . . . . . . . . 13 | |
39 | 37, 38 | orbi12i 713 | . . . . . . . . . . . 12 |
40 | 36, 39 | imbi12i 237 | . . . . . . . . . . 11 |
41 | 40 | 2ralbii 2374 | . . . . . . . . . 10 |
42 | 41 | ralbii 2372 | . . . . . . . . 9 |
43 | 35, 42 | mpbi 143 | . . . . . . . 8 |
44 | 43 | rspec3 2451 | . . . . . . 7 |
45 | 24, 31, 44 | vtocl 2653 | . . . . . 6 |
46 | 16, 23, 45 | vtocl 2653 | . . . . 5 |
47 | 2, 15, 46 | vtocl 2653 | . . . 4 |
48 | 1, 4, 8, 47 | mp3an 1268 | . . 3 |
49 | 2 | elsn 3414 | . . . . 5 |
50 | ordtriexmidlem2 4264 | . . . . 5 | |
51 | 49, 50 | sylbi 119 | . . . 4 |
52 | elirr 4284 | . . . . . . 7 | |
53 | elrabi 2746 | . . . . . . 7 | |
54 | 52, 53 | mto 620 | . . . . . 6 |
55 | elsuci 4158 | . . . . . . 7 | |
56 | 55 | ord 675 | . . . . . 6 |
57 | 54, 56 | mpi 15 | . . . . 5 |
58 | 0ex 3905 | . . . . . . 7 | |
59 | biidd 170 | . . . . . . 7 | |
60 | 58, 59 | rabsnt 3467 | . . . . . 6 |
61 | 60 | eqcoms 2084 | . . . . 5 |
62 | 57, 61 | syl 14 | . . . 4 |
63 | 51, 62 | orim12i 708 | . . 3 |
64 | 3, 48, 63 | mp2b 8 | . 2 |
65 | orcom 679 | . 2 | |
66 | 64, 65 | mpbi 143 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 102 wo 661 w3a 919 wceq 1284 wcel 1433 wral 2348 crab 2352 c0 3251 csn 3398 class class class wbr 3785 cep 4042 wpo 4049 wor 4050 con0 4118 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-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-setind 4280 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ne 2246 df-ral 2353 df-rex 2354 df-rab 2357 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-op 3407 df-uni 3602 df-br 3786 df-opab 3840 df-tr 3876 df-eprel 4044 df-iso 4052 df-iord 4121 df-on 4123 df-suc 4126 |
This theorem is referenced by: (None) |
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