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| Description: Two ways of saying a relation is irreflexive. Definition of irreflexivity in [Schechter] p. 51. |
| Ref | Expression |
|---|---|
| intirr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inss2 1658 |
. . . 4
| |
| 2 | reli 2500 |
. . . 4
| |
| 3 | ssrel 2479 |
. . . 4
| |
| 4 | 1, 2, 3 | mp2 43 |
. . 3
|
| 5 | rel0 2499 |
. . 3
| |
| 6 | cleqrel 2483 |
. . 3
| |
| 7 | 4, 5, 6 | mp2an 520 |
. 2
|
| 8 | df-br 2063 |
. . . . . 6
| |
| 9 | visset 1350 |
. . . . . . 7
| |
| 10 | opeq2 1877 |
. . . . . . . 8
| |
| 11 | 10 | eleq1d 1155 |
. . . . . . 7
|
| 12 | 9, 11 | ceqsexv 1371 |
. . . . . 6
|
| 13 | 8, 12 | bitr4 154 |
. . . . 5
|
| 14 | noel 1711 |
. . . . . . . . 9
| |
| 15 | 14 | nbn 542 |
. . . . . . . 8
|
| 16 | 15 | bicon1i 193 |
. . . . . . 7
|
| 17 | visset 1350 |
. . . . . . . . . . 11
| |
| 18 | 9, 17 | ideq 2127 |
. . . . . . . . . 10
|
| 19 | df-br 2063 |
. . . . . . . . . 10
| |
| 20 | cleqcom 1103 |
. . . . . . . . . 10
| |
| 21 | 18, 19, 20 | 3bitr3r 157 |
. . . . . . . . 9
|
| 22 | 21 | anbi2i 367 |
. . . . . . . 8
|
| 23 | ancom 333 |
. . . . . . . 8
| |
| 24 | elin 1635 |
. . . . . . . 8
| |
| 25 | 22, 23, 24 | 3bitr4r 159 |
. . . . . . 7
|
| 26 | 16, 25 | bitr2 152 |
. . . . . 6
|
| 27 | 26 | biex 733 |
. . . . 5
|
| 28 | exnal 721 |
. . . . 5
| |
| 29 | 13, 27, 28 | 3bitr 155 |
. . . 4
|
| 30 | 29 | bicon2i 194 |
. . 3
|
| 31 | 30 | bial 695 |
. 2
|
| 32 | 7, 31 | bitr 151 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 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-id 2125 df-xp 2424 df-rel 2425 |