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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 2819 |
. . . 4
| |
| 3 | 1, 2 | mpan 692 |
. . 3
|
| 4 | 3 | adantl 388 |
. 2
|
| 5 | soi.1 |
. . . 4
| |
| 6 | soi.3 |
. . . 4
| |
| 7 | 5, 6 | brel 3185 |
. . 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 3393 ltrpq 5008 1pr 5040 ltapr 5074 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-4 951 ax-5 952 ax-6 953 ax-7 954 ax-gen 955 ax-8 1101 ax-9 1102 ax-10 1103 ax-12 1104 ax-13 1107 ax-14 1108 ax-11 1180 ax-17 1190 ax-16 1194 ax-11o 1202 ax-ext 1436 ax-sep 2671 ax-nul 2678 ax-pow 2710 ax-pr 2747 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 774 df-ex 957 df-sb 1155 df-eu 1359 df-mo 1360 df-clab 1441 df-cleq 1446 df-clel 1449 df-ne 1563 df-ral 1625 df-v 1787 df-dif 2020 df-un 2021 df-in 2022 df-ss 2024 df-nul 2252 df-pw 2373 df-sn 2383 df-pr 2384 df-op 2387 df-br 2588 df-opab 2635 df-po 2804 df-so 2814 df-xp 3147 |