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| Description: A trichotomy law for ordinal numbers. |
| Ref | Expression |
|---|---|
| ontri1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordtri1 2231 |
. 2
| |
| 2 | eloni 2209 |
. 2
| |
| 3 | eloni 2209 |
. 2
| |
| 4 | 1, 2, 3 | syl2an 349 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: onint 2261 onnmin 2270 oneqmini 2272 onmindif 2312 onmindif2 2313 dfom2 2374 oawordeulem 3156 rankr1lem 3517 rankr1 3518 rankr1a 3521 rankel 3524 unbndrank 3527 cardne 3637 carden 3638 carddom 3642 domtri 3644 sdomel 3653 cardsdomel 3658 ondomcard 3663 cardprc 3667 alephord 3680 alephord3 3683 alephle 3689 |
| 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 df-on 2203 |