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Mirrors > Home > ILE Home > Th. List > resco | Unicode version |
Description: Associative law for the restriction of a composition. (Contributed by NM, 12-Dec-2006.) |
Ref | Expression |
---|---|
resco |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relres 4657 | . 2 | |
2 | relco 4839 | . 2 | |
3 | vex 2604 | . . . . . 6 | |
4 | vex 2604 | . . . . . 6 | |
5 | 3, 4 | brco 4524 | . . . . 5 |
6 | 5 | anbi1i 445 | . . . 4 |
7 | 19.41v 1823 | . . . 4 | |
8 | an32 526 | . . . . . 6 | |
9 | vex 2604 | . . . . . . . 8 | |
10 | 9 | brres 4636 | . . . . . . 7 |
11 | 10 | anbi1i 445 | . . . . . 6 |
12 | 8, 11 | bitr4i 185 | . . . . 5 |
13 | 12 | exbii 1536 | . . . 4 |
14 | 6, 7, 13 | 3bitr2i 206 | . . 3 |
15 | 4 | brres 4636 | . . 3 |
16 | 3, 4 | brco 4524 | . . 3 |
17 | 14, 15, 16 | 3bitr4i 210 | . 2 |
18 | 1, 2, 17 | eqbrriv 4453 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wceq 1284 wex 1421 wcel 1433 class class class wbr 3785 cres 4365 ccom 4367 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-br 3786 df-opab 3840 df-xp 4369 df-rel 4370 df-co 4372 df-res 4375 |
This theorem is referenced by: cocnvcnv2 4852 coires1 4858 relcoi1 4869 dftpos2 5899 |
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