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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 5052 |
. . . 4
| |
| 2 | cotr 5052 |
. . . . . 6
| |
| 3 | brin 4086 |
. . . . . . . . . . . . 13
| |
| 4 | brin 4086 |
. . . . . . . . . . . . 13
| |
| 5 | simpr 110 |
. . . . . . . . . . . . . . . 16
| |
| 6 | simpl 109 |
. . . . . . . . . . . . . . . 16
| |
| 7 | 5, 6 | anim12d 335 |
. . . . . . . . . . . . . . 15
|
| 8 | 7 | com12 30 |
. . . . . . . . . . . . . 14
|
| 9 | 8 | an4s 588 |
. . . . . . . . . . . . 13
|
| 10 | 3, 4, 9 | syl2anb 291 |
. . . . . . . . . . . 12
|
| 11 | 10 | com12 30 |
. . . . . . . . . . 11
|
| 12 | brin 4086 |
. . . . . . . . . . 11
| |
| 13 | 11, 12 | imbitrrdi 162 |
. . . . . . . . . 10
|
| 14 | 13 | alanimi 1473 |
. . . . . . . . 9
|
| 15 | 14 | alanimi 1473 |
. . . . . . . 8
|
| 16 | 15 | alanimi 1473 |
. . . . . . 7
|
| 17 | 16 | ex 115 |
. . . . . 6
|
| 18 | 2, 17 | sylbi 121 |
. . . . 5
|
| 19 | 18 | com12 30 |
. . . 4
|
| 20 | 1, 19 | sylbi 121 |
. . 3
|
| 21 | 20 | imp 124 |
. 2
|
| 22 | cotr 5052 |
. 2
| |
| 23 | 21, 22 | sylibr 134 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-v 2765 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-br 4035 df-opab 4096 df-xp 4670 df-rel 4671 df-co 4673 |
| This theorem is referenced by: trinxp 5064 |
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