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 |
|