Step |
Hyp |
Ref |
Expression |
1 |
|
lmbr3.1 |
|
2 |
|
lmbr3.2 |
|
3 |
2
|
lmbr3v |
|
4 |
|
eleq2w |
|
5 |
|
eleq2w |
|
6 |
5
|
anbi2d |
|
7 |
6
|
rexralbidv |
|
8 |
|
fveq2 |
|
9 |
8
|
raleqdv |
|
10 |
|
nfcv |
|
11 |
1
|
nfdm |
|
12 |
10 11
|
nfel |
|
13 |
1 10
|
nffv |
|
14 |
|
nfcv |
|
15 |
13 14
|
nfel |
|
16 |
12 15
|
nfan |
|
17 |
|
nfv |
|
18 |
|
eleq1w |
|
19 |
|
fveq2 |
|
20 |
19
|
eleq1d |
|
21 |
18 20
|
anbi12d |
|
22 |
16 17 21
|
cbvralw |
|
23 |
9 22
|
syl6bb |
|
24 |
23
|
cbvrexvw |
|
25 |
7 24
|
syl6bb |
|
26 |
4 25
|
imbi12d |
|
27 |
26
|
cbvralvw |
|
28 |
27
|
3anbi3i |
|
29 |
3 28
|
syl6bb |
|