| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: A strict order relation is irreflexive. |
| Ref | Expression |
|---|---|
| soi.1 |
|
| soi.2 |
|
| soi.3 |
|
| Ref | Expression |
|---|---|
| soirri |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | soi.2 |
. . . 4
| |
| 2 | sonr 2143 |
. . . 4
| |
| 3 | 1, 2 | mpan 518 |
. . 3
|
| 4 | 3 | adantl 305 |
. 2
|
| 5 | soi.1 |
. . . 4
| |
| 6 | soi.3 |
. . . 4
| |
| 7 | 5, 6 | brel 2459 |
. . 3
|
| 8 | 7 | con3i 90 |
. 2
|
| 9 | 4, 8 | pm2.61i 110 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: son2lpi 2631 ltrpq 3879 1pr 3911 ltapr 3945 |
| 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-3an 583 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 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-br 2063 df-opab 2098 df-po 2128 df-so 2138 df-xp 2424 |