Step |
Hyp |
Ref |
Expression |
1 |
|
id |
|
2 |
|
dmexg |
|
3 |
2
|
uniexd |
|
4 |
3
|
pwexd |
|
5 |
|
rabexg |
|
6 |
4 5
|
syl |
|
7 |
|
dmeq |
|
8 |
7
|
unieqd |
|
9 |
8
|
pweqd |
|
10 |
9
|
raleqdv |
|
11 |
|
fveq1 |
|
12 |
|
fveq1 |
|
13 |
11 12
|
oveq12d |
|
14 |
|
fveq1 |
|
15 |
13 14
|
eqeq12d |
|
16 |
15
|
ralbidv |
|
17 |
10 16
|
bitrd |
|
18 |
9 17
|
rabeqbidv |
|
19 |
|
df-caragen |
|
20 |
18 19
|
fvmptg |
|
21 |
1 6 20
|
syl2anc |
|