Step |
Hyp |
Ref |
Expression |
1 |
|
simpr |
|
2 |
|
reldom |
|
3 |
2
|
brrelex12i |
|
4 |
|
simpl |
|
5 |
|
ssexg |
|
6 |
5
|
adantrr |
|
7 |
|
simprr |
|
8 |
4 6 7
|
jca32 |
|
9 |
3 8
|
sylan2 |
|
10 |
|
brdomi |
|
11 |
|
f1ssres |
|
12 |
|
vex |
|
13 |
12
|
resex |
|
14 |
|
f1dom4g |
|
15 |
13 14
|
mp3anl1 |
|
16 |
15
|
ancoms |
|
17 |
11 16
|
sylan |
|
18 |
17
|
expl |
|
19 |
18
|
exlimiv |
|
20 |
10 19
|
syl |
|
21 |
1 9 20
|
sylc |
|