Step |
Hyp |
Ref |
Expression |
1 |
|
shftfval.1 |
|
2 |
1
|
shftfval |
|
3 |
2
|
breqd |
|
4 |
|
eleq1 |
|
5 |
|
oveq1 |
|
6 |
5
|
breq1d |
|
7 |
4 6
|
anbi12d |
|
8 |
|
breq2 |
|
9 |
8
|
anbi2d |
|
10 |
|
eqid |
|
11 |
7 9 10
|
brabg |
|
12 |
11
|
elvd |
|
13 |
3 12
|
sylan9bb |
|
14 |
|
ibar |
|
15 |
14
|
adantl |
|
16 |
13 15
|
bitr4d |
|
17 |
16
|
abbidv |
|
18 |
|
imasng |
|
19 |
18
|
adantl |
|
20 |
|
ovex |
|
21 |
|
imasng |
|
22 |
20 21
|
mp1i |
|
23 |
17 19 22
|
3eqtr4d |
|