Step |
Hyp |
Ref |
Expression |
1 |
|
simpl |
|
2 |
|
simpr1 |
|
3 |
|
simpr3 |
|
4 |
|
simpr2 |
|
5 |
|
cgrcom |
|
6 |
1 2 3 2 4 5
|
syl122anc |
|
7 |
6
|
biimpd |
|
8 |
|
idd |
|
9 |
|
axcgrrflx |
|
10 |
9
|
3adant3r1 |
|
11 |
10
|
a1d |
|
12 |
7 8 11
|
3jcad |
|
13 |
|
3ancomb |
|
14 |
|
brcgr3 |
|
15 |
13 14
|
syl3an3br |
|
16 |
15
|
3anidm23 |
|
17 |
12 16
|
sylibrd |
|
18 |
|
btwnxfr |
|
19 |
13 18
|
syl3an3br |
|
20 |
19
|
3anidm23 |
|
21 |
17 20
|
sylan2d |
|
22 |
|
simpl |
|
23 |
22
|
a1i |
|
24 |
21 23
|
jcad |
|
25 |
|
3anrot |
|
26 |
|
btwnswapid2 |
|
27 |
25 26
|
sylan2br |
|
28 |
24 27
|
syld |
|