Step |
Hyp |
Ref |
Expression |
1 |
|
isvclem.1 |
|
2 |
|
df-vc |
|
3 |
2
|
eleq2i |
|
4 |
|
eleq1 |
|
5 |
|
rneq |
|
6 |
5 1
|
eqtr4di |
|
7 |
|
xpeq2 |
|
8 |
7
|
feq2d |
|
9 |
|
feq3 |
|
10 |
8 9
|
bitrd |
|
11 |
6 10
|
syl |
|
12 |
|
oveq |
|
13 |
12
|
oveq2d |
|
14 |
|
oveq |
|
15 |
13 14
|
eqeq12d |
|
16 |
6 15
|
raleqbidv |
|
17 |
|
oveq |
|
18 |
17
|
eqeq2d |
|
19 |
18
|
anbi1d |
|
20 |
19
|
ralbidv |
|
21 |
16 20
|
anbi12d |
|
22 |
21
|
ralbidv |
|
23 |
22
|
anbi2d |
|
24 |
6 23
|
raleqbidv |
|
25 |
4 11 24
|
3anbi123d |
|
26 |
|
feq1 |
|
27 |
|
oveq |
|
28 |
27
|
eqeq1d |
|
29 |
|
oveq |
|
30 |
|
oveq |
|
31 |
|
oveq |
|
32 |
30 31
|
oveq12d |
|
33 |
29 32
|
eqeq12d |
|
34 |
33
|
ralbidv |
|
35 |
|
oveq |
|
36 |
|
oveq |
|
37 |
30 36
|
oveq12d |
|
38 |
35 37
|
eqeq12d |
|
39 |
|
oveq |
|
40 |
|
oveq |
|
41 |
36
|
oveq2d |
|
42 |
40 41
|
eqtrd |
|
43 |
39 42
|
eqeq12d |
|
44 |
38 43
|
anbi12d |
|
45 |
44
|
ralbidv |
|
46 |
34 45
|
anbi12d |
|
47 |
46
|
ralbidv |
|
48 |
28 47
|
anbi12d |
|
49 |
48
|
ralbidv |
|
50 |
26 49
|
3anbi23d |
|
51 |
25 50
|
opelopabg |
|
52 |
3 51
|
syl5bb |
|