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Mirrors > Home > ILE Home > Th. List > ordtri2orexmid | Unicode version |
Description: Ordinal trichotomy implies excluded middle. (Contributed by Jim Kingdon, 31-Jul-2019.) |
Ref | Expression |
---|---|
ordtri2orexmid.1 |
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Ref | Expression |
---|---|
ordtri2orexmid |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ordtri2orexmid.1 |
. . . 4
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2 | ordtriexmidlem 4263 |
. . . . 5
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3 | suc0 4166 |
. . . . . 6
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4 | 0elon 4147 |
. . . . . . 7
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5 | 4 | onsuci 4260 |
. . . . . 6
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6 | 3, 5 | eqeltrri 2152 |
. . . . 5
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7 | eleq1 2141 |
. . . . . . 7
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8 | sseq2 3021 |
. . . . . . 7
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9 | 7, 8 | orbi12d 739 |
. . . . . 6
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10 | eleq2 2142 |
. . . . . . 7
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11 | sseq1 3020 |
. . . . . . 7
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12 | 10, 11 | orbi12d 739 |
. . . . . 6
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13 | 9, 12 | rspc2va 2714 |
. . . . 5
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14 | 2, 6, 13 | mpanl12 426 |
. . . 4
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15 | 1, 14 | ax-mp 7 |
. . 3
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16 | elsni 3416 |
. . . . 5
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17 | ordtriexmidlem2 4264 |
. . . . 5
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18 | 16, 17 | syl 14 |
. . . 4
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19 | snssg 3522 |
. . . . . 6
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20 | 4, 19 | ax-mp 7 |
. . . . 5
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21 | 0ex 3905 |
. . . . . . . 8
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22 | 21 | snid 3425 |
. . . . . . 7
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23 | biidd 170 |
. . . . . . . 8
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24 | 23 | elrab3 2750 |
. . . . . . 7
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25 | 22, 24 | ax-mp 7 |
. . . . . 6
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26 | 25 | biimpi 118 |
. . . . 5
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27 | 20, 26 | sylbir 133 |
. . . 4
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28 | 18, 27 | orim12i 708 |
. . 3
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
29 | 15, 28 | ax-mp 7 |
. 2
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30 | orcom 679 |
. 2
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31 | 29, 30 | mpbi 143 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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 |
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-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-uni 3602 df-tr 3876 df-iord 4121 df-on 4123 df-suc 4126 |
This theorem is referenced by: (None) |
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