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| Description: A trichotomy law for ordinals. |
| Ref | Expression |
|---|---|
| ordtri3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 1150 |
. . . . . . 7
| |
| 2 | 1 | negbid 463 |
. . . . . 6
|
| 3 | ordeirr 2217 |
. . . . . 6
| |
| 4 | 2, 3 | syl5bi 183 |
. . . . 5
|
| 5 | eleq2 1150 |
. . . . . . 7
| |
| 6 | 5 | negbid 463 |
. . . . . 6
|
| 7 | ordeirr 2217 |
. . . . . 6
| |
| 8 | 6, 7 | syl5bir 184 |
. . . . 5
|
| 9 | 4, 8 | anim12d 431 |
. . . 4
|
| 10 | ioran 254 |
. . . 4
| |
| 11 | 9, 10 | syl6ibr 186 |
. . 3
|
| 12 | 11 | com12 13 |
. 2
|
| 13 | ordtri3or 2230 |
. . 3
| |
| 14 | df-3or 582 |
. . . 4
| |
| 15 | or23 219 |
. . . 4
| |
| 16 | df-or 197 |
. . . 4
| |
| 17 | 14, 15, 16 | 3bitr 155 |
. . 3
|
| 18 | 13, 17 | sylib 173 |
. 2
|
| 19 | 12, 18 | impbid 397 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: ordtri4 2235 tz7.48lem 2993 oacan 3150 nnmcan 3190 omsmo 3196 inf3lem6 3469 om2uzf1o 4656 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 |