| Step |
Hyp |
Ref |
Expression |
| 1 |
|
btwnxfr |
|
| 2 |
1
|
expcomd |
|
| 3 |
2
|
imp |
|
| 4 |
|
cgr3permute4 |
|
| 5 |
|
biid |
|
| 6 |
|
3anrot |
|
| 7 |
|
3anrot |
|
| 8 |
|
btwnxfr |
|
| 9 |
5 6 7 8
|
syl3anbr |
|
| 10 |
9
|
expcomd |
|
| 11 |
4 10
|
sylbid |
|
| 12 |
11
|
imp |
|
| 13 |
|
cgr3permute3 |
|
| 14 |
|
3anrot |
|
| 15 |
|
3anrot |
|
| 16 |
|
btwnxfr |
|
| 17 |
5 14 15 16
|
syl3anb |
|
| 18 |
17
|
expcomd |
|
| 19 |
13 18
|
sylbid |
|
| 20 |
19
|
imp |
|
| 21 |
3 12 20
|
3orim123d |
|
| 22 |
|
simp1 |
|
| 23 |
|
simp22 |
|
| 24 |
|
simp21 |
|
| 25 |
|
simp23 |
|
| 26 |
|
brcolinear |
|
| 27 |
22 23 24 25 26
|
syl13anc |
|
| 28 |
27
|
adantr |
|
| 29 |
|
simp32 |
|
| 30 |
|
simp31 |
|
| 31 |
|
simp33 |
|
| 32 |
|
brcolinear |
|
| 33 |
22 29 30 31 32
|
syl13anc |
|
| 34 |
33
|
adantr |
|
| 35 |
21 28 34
|
3imtr4d |
|
| 36 |
35
|
ex |
|
| 37 |
36
|
com23 |
|
| 38 |
37
|
impd |
|