Step |
Hyp |
Ref |
Expression |
1 |
|
qtopval.1 |
|
2 |
1
|
qtopval2 |
|
3 |
2
|
eleq2d |
|
4 |
|
imaeq2 |
|
5 |
4
|
eleq1d |
|
6 |
5
|
elrab |
|
7 |
|
uniexg |
|
8 |
1 7
|
eqeltrid |
|
9 |
8
|
3ad2ant1 |
|
10 |
|
simp3 |
|
11 |
9 10
|
ssexd |
|
12 |
|
simp2 |
|
13 |
|
fornex |
|
14 |
11 12 13
|
sylc |
|
15 |
|
elpw2g |
|
16 |
14 15
|
syl |
|
17 |
16
|
anbi1d |
|
18 |
6 17
|
syl5bb |
|
19 |
3 18
|
bitrd |
|