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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 2228 |
. . . 4
| |
| 2 | reli 3269 |
. . . 4
| |
| 3 | relss 3242 |
. . . 4
| |
| 4 | 1, 2, 3 | mp2 43 |
. . 3
|
| 5 | rel0 3268 |
. . 3
| |
| 6 | eqrel 3246 |
. . 3
| |
| 7 | 4, 5, 6 | mp2an 696 |
. 2
|
| 8 | df-br 2616 |
. . . . . 6
| |
| 9 | visset 1810 |
. . . . . . 7
| |
| 10 | opeq2 2485 |
. . . . . . . 8
| |
| 11 | 10 | eleq1d 1538 |
. . . . . . 7
|
| 12 | 9, 11 | ceqsexv 1832 |
. . . . . 6
|
| 13 | 8, 12 | bitr4 176 |
. . . . 5
|
| 14 | noel 2281 |
. . . . . . . . 9
| |
| 15 | 14 | nbn 721 |
. . . . . . . 8
|
| 16 | 15 | con1bii 220 |
. . . . . . 7
|
| 17 | visset 1810 |
. . . . . . . . . . 11
| |
| 18 | 17 | ideq 3273 |
. . . . . . . . . 10
|
| 19 | df-br 2616 |
. . . . . . . . . 10
| |
| 20 | eqcom 1475 |
. . . . . . . . . 10
| |
| 21 | 18, 19, 20 | 3bitr3r 182 |
. . . . . . . . 9
|
| 22 | 21 | anbi2i 480 |
. . . . . . . 8
|
| 23 | ancom 435 |
. . . . . . . 8
| |
| 24 | elin 2204 |
. . . . . . . 8
| |
| 25 | 22, 23, 24 | 3bitr4r 184 |
. . . . . . 7
|
| 26 | 16, 25 | bitr2 174 |
. . . . . 6
|
| 27 | 26 | exbii 1050 |
. . . . 5
|
| 28 | exnal 1037 |
. . . . 5
| |
| 29 | 13, 27, 28 | 3bitr 177 |
. . . 4
|
| 30 | 29 | con2bii 221 |
. . 3
|
| 31 | 30 | albii 998 |
. 2
|
| 32 | 7, 31 | bitr 173 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-pow 2738 ax-pr 2775 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-br 2616 df-opab 2663 df-id 2831 df-xp 3180 df-rel 3181 |