| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| 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 2231 |
. . . 4
| |
| 2 | reli 3273 |
. . . 4
| |
| 3 | relss 3246 |
. . . 4
| |
| 4 | 1, 2, 3 | mp2 43 |
. . 3
|
| 5 | rel0 3272 |
. . 3
| |
| 6 | eqrel 3250 |
. . 3
| |
| 7 | 4, 5, 6 | mp2an 697 |
. 2
|
| 8 | df-br 2620 |
. . . . . 6
| |
| 9 | visset 1813 |
. . . . . . 7
| |
| 10 | opeq2 2488 |
. . . . . . . 8
| |
| 11 | 10 | eleq1d 1540 |
. . . . . . 7
|
| 12 | 9, 11 | ceqsexv 1835 |
. . . . . 6
|
| 13 | 8, 12 | bitr4 176 |
. . . . 5
|
| 14 | noel 2284 |
. . . . . . . . 9
| |
| 15 | 14 | nbn 722 |
. . . . . . . 8
|
| 16 | 15 | con1bii 220 |
. . . . . . 7
|
| 17 | visset 1813 |
. . . . . . . . . . 11
| |
| 18 | 17 | ideq 3277 |
. . . . . . . . . 10
|
| 19 | df-br 2620 |
. . . . . . . . . 10
| |
| 20 | eqcom 1477 |
. . . . . . . . . 10
| |
| 21 | 18, 19, 20 | 3bitr3r 182 |
. . . . . . . . 9
|
| 22 | 21 | anbi2i 480 |
. . . . . . . 8
|
| 23 | ancom 435 |
. . . . . . . 8
| |
| 24 | elin 2207 |
. . . . . . . 8
| |
| 25 | 22, 23, 24 | 3bitr4r 184 |
. . . . . . 7
|
| 26 | 16, 25 | bitr2 174 |
. . . . . 6
|
| 27 | 26 | exbii 1051 |
. . . . 5
|
| 28 | exnal 1038 |
. . . . 5
| |
| 29 | 13, 27, 28 | 3bitr 177 |
. . . 4
|
| 30 | 29 | con2bii 221 |
. . 3
|
| 31 | 30 | albii 999 |
. 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-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-br 2620 df-opab 2667 df-id 2835 df-xp 3184 df-rel 3185 |