Step |
Hyp |
Ref |
Expression |
1 |
|
ov.1 |
|
2 |
|
ov.2 |
|
3 |
|
ov.3 |
|
4 |
|
ov.4 |
|
5 |
|
ov.5 |
|
6 |
|
ov.6 |
|
7 |
|
df-ov |
|
8 |
6
|
fveq1i |
|
9 |
7 8
|
eqtri |
|
10 |
9
|
eqeq1i |
|
11 |
5
|
fnoprab |
|
12 |
|
eleq1 |
|
13 |
12
|
anbi1d |
|
14 |
|
eleq1 |
|
15 |
14
|
anbi2d |
|
16 |
13 15
|
opelopabg |
|
17 |
16
|
ibir |
|
18 |
|
fnopfvb |
|
19 |
11 17 18
|
sylancr |
|
20 |
13 2
|
anbi12d |
|
21 |
15 3
|
anbi12d |
|
22 |
4
|
anbi2d |
|
23 |
20 21 22
|
eloprabg |
|
24 |
1 23
|
mp3an3 |
|
25 |
19 24
|
bitrd |
|
26 |
10 25
|
syl5bb |
|
27 |
26
|
bianabs |
|