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Mirrors > Home > ILE Home > Th. List > trin2 | Unicode version |
Description: The intersection of two transitive classes is transitive. (Contributed by FL, 31-Jul-2009.) |
Ref | Expression |
---|---|
trin2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cotr 4985 | . . . 4 | |
2 | cotr 4985 | . . . . . 6 | |
3 | brin 4034 | . . . . . . . . . . . . 13 | |
4 | brin 4034 | . . . . . . . . . . . . 13 | |
5 | simpr 109 | . . . . . . . . . . . . . . . 16 | |
6 | simpl 108 | . . . . . . . . . . . . . . . 16 | |
7 | 5, 6 | anim12d 333 | . . . . . . . . . . . . . . 15 |
8 | 7 | com12 30 | . . . . . . . . . . . . . 14 |
9 | 8 | an4s 578 | . . . . . . . . . . . . 13 |
10 | 3, 4, 9 | syl2anb 289 | . . . . . . . . . . . 12 |
11 | 10 | com12 30 | . . . . . . . . . . 11 |
12 | brin 4034 | . . . . . . . . . . 11 | |
13 | 11, 12 | syl6ibr 161 | . . . . . . . . . 10 |
14 | 13 | alanimi 1447 | . . . . . . . . 9 |
15 | 14 | alanimi 1447 | . . . . . . . 8 |
16 | 15 | alanimi 1447 | . . . . . . 7 |
17 | 16 | ex 114 | . . . . . 6 |
18 | 2, 17 | sylbi 120 | . . . . 5 |
19 | 18 | com12 30 | . . . 4 |
20 | 1, 19 | sylbi 120 | . . 3 |
21 | 20 | imp 123 | . 2 |
22 | cotr 4985 | . 2 | |
23 | 21, 22 | sylibr 133 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wal 1341 cin 3115 wss 3116 class class class wbr 3982 ccom 4608 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-br 3983 df-opab 4044 df-xp 4610 df-rel 4611 df-co 4613 |
This theorem is referenced by: trinxp 4997 |
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