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| Description: Composition (transitive) law for isomorphism. Proposition 6.30(3) of [TakeutiZaring] p. 33. This proof is shorter than isotr 2935 in set.mm and uses fewer dummy variables, but it takes 240K vs. 207K for the web page. |
| Ref | Expression |
|---|---|
| isotrALT |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pm3.26 256 |
. . . . . 6
| |
| 2 | pm3.26 256 |
. . . . . 6
| |
| 3 | 1, 2 | anim12i 268 |
. . . . 5
|
| 4 | 3 | ancoms 334 |
. . . 4
|
| 5 | f1oco 2816 |
. . . 4
| |
| 6 | 4, 5 | syl 12 |
. . 3
|
| 7 | ax-17 925 |
. . . . . 6
| |
| 8 | hbra1 1237 |
. . . . . 6
| |
| 9 | 7, 8 | hban 704 |
. . . . 5
|
| 10 | ax-17 925 |
. . . . 5
| |
| 11 | 9, 10 | hban 704 |
. . . 4
|
| 12 | ax-17 925 |
. . . . . . 7
| |
| 13 | ax-17 925 |
. . . . . . . 8
| |
| 14 | hbra1 1237 |
. . . . . . . 8
| |
| 15 | 13, 14 | hbral 1236 |
. . . . . . 7
|
| 16 | 12, 15 | hban 704 |
. . . . . 6
|
| 17 | ax-17 925 |
. . . . . 6
| |
| 18 | 16, 17 | hban 704 |
. . . . 5
|
| 19 | f1of 2800 |
. . . . . . . . . . 11
| |
| 20 | ffvrn 2890 |
. . . . . . . . . . . . 13
| |
| 21 | 20 | exp 291 |
. . . . . . . . . . . 12
|
| 22 | ffvrn 2890 |
. . . . . . . . . . . . 13
| |
| 23 | 22 | exp 291 |
. . . . . . . . . . . 12
|
| 24 | 21, 23 | anim12d 431 |
. . . . . . . . . . 11
|
| 25 | 19, 24 | syl 12 |
. . . . . . . . . 10
|
| 26 | 25 | adantr 306 |
. . . . . . . . 9
|
| 27 | breq1 2065 |
. . . . . . . . . . . 12
| |
| 28 | fveq2 2832 |
. . . . . . . . . . . . 13
| |
| 29 | 28 | breq1d 2071 |
. . . . . . . . . . . 12
|
| 30 | 27, 29 | bibi12d 477 |
. . . . . . . . . . 11
|
| 31 | breq2 2066 |
. . . . . . . . . . . 12
| |
| 32 | fveq2 2832 |
. . . . . . . . . . . . 13
| |
| 33 | 32 | breq2d 2072 |
. . . . . . . . . . . 12
|
| 34 | 31, 33 | bibi12d 477 |
. . . . . . . . . . 11
|
| 35 | 30, 34 | rcla42v 1404 |
. . . . . . . . . 10
|
| 36 | 35 | adantl 305 |
. . . . . . . . 9
|
| 37 | 26, 36 | sylan9 359 |
. . . . . . . 8
|
| 38 | 37 | imp 277 |
. . . . . . 7
|