Step |
Hyp |
Ref |
Expression |
1 |
|
cpcolld.1 |
|
2 |
|
cpcolld.2 |
|
3 |
|
vex |
|
4 |
|
breq2 |
|
5 |
3 4
|
elab |
|
6 |
2 5
|
sylibr |
|
7 |
6
|
19.8ad |
|
8 |
7
|
scotteld |
|
9 |
|
ssiun2 |
|
10 |
|
dfcoll2 |
|
11 |
9 10
|
sseqtrrdi |
|
12 |
11
|
sselda |
|
13 |
4
|
elscottab |
|
14 |
13
|
adantl |
|
15 |
12 14
|
jca |
|
16 |
15
|
ex |
|
17 |
16
|
eximdv |
|
18 |
1 8 17
|
sylc |
|
19 |
|
df-rex |
|
20 |
18 19
|
sylibr |
|