Step |
Hyp |
Ref |
Expression |
1 |
|
simpl |
|
2 |
1
|
dmeqd |
|
3 |
|
simpr |
|
4 |
3
|
dmeqd |
|
5 |
4
|
unieqd |
|
6 |
2 5
|
oveq12d |
|
7 |
6
|
eleq2d |
|
8 |
6
|
eleq2d |
|
9 |
7 8
|
anbi12d |
|
10 |
1
|
breqd |
|
11 |
5 10
|
rabeqbidv |
|
12 |
11 3
|
breq12d |
|
13 |
9 12
|
anbi12d |
|
14 |
13
|
opabbidv |
|
15 |
|
df-fae |
|
16 |
|
ovex |
|
17 |
16 16
|
xpex |
|
18 |
|
opabssxp |
|
19 |
17 18
|
ssexi |
|
20 |
14 15 19
|
ovmpoa |
|