Step |
Hyp |
Ref |
Expression |
1 |
|
unxpdomlem1.1 |
|
2 |
|
unxpdomlem1.2 |
|
3 |
|
elequ1 |
|
4 |
|
opeq1 |
|
5 |
|
equequ1 |
|
6 |
5
|
ifbid |
|
7 |
6
|
opeq2d |
|
8 |
4 7
|
eqtrd |
|
9 |
|
equequ1 |
|
10 |
9
|
ifbid |
|
11 |
10
|
opeq1d |
|
12 |
|
opeq2 |
|
13 |
11 12
|
eqtrd |
|
14 |
3 8 13
|
ifbieq12d |
|
15 |
2 14
|
eqtrid |
|
16 |
|
opex |
|
17 |
|
opex |
|
18 |
16 17
|
ifex |
|
19 |
15 1 18
|
fvmpt |
|