| 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 2846 |
. . . 4
| |
| 3 | 1, 2 | mpan 693 |
. . 3
|
| 4 | 3 | adantl 388 |
. 2
|
| 5 | soi.1 |
. . . 4
| |
| 6 | soi.3 |
. . . 4
| |
| 7 | 5, 6 | brel 3213 |
. . 3
|
| 8 | 7 | con3i 98 |
. 2
|
| 9 | 4, 8 | pm2.61i 126 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: son2lpi 3430 ltrpq 5057 1pr 5089 ltapr 5123 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 775 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-ral 1641 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-br 2610 df-opab 2657 df-po 2831 df-so 2841 df-xp 3174 |