Step |
Hyp |
Ref |
Expression |
1 |
|
opsqrlem2.1 |
|
2 |
|
opsqrlem2.2 |
|
3 |
|
opsqrlem2.3 |
|
4 |
|
id |
|
5 |
4 4
|
coeq12d |
|
6 |
5
|
oveq2d |
|
7 |
6
|
oveq2d |
|
8 |
4 7
|
oveq12d |
|
9 |
|
eqidd |
|
10 |
|
id |
|
11 |
10 10
|
coeq12d |
|
12 |
11
|
oveq2d |
|
13 |
12
|
oveq2d |
|
14 |
10 13
|
oveq12d |
|
15 |
|
eqidd |
|
16 |
14 15
|
cbvmpov |
|
17 |
2 16
|
eqtri |
|
18 |
|
ovex |
|
19 |
8 9 17 18
|
ovmpo |
|