Step |
Hyp |
Ref |
Expression |
1 |
|
shftfval.1 |
|
2 |
1
|
shftfval |
|
3 |
2
|
breqd |
|
4 |
|
ovex |
|
5 |
|
vex |
|
6 |
|
eleq1 |
|
7 |
|
oveq1 |
|
8 |
7
|
breq1d |
|
9 |
6 8
|
anbi12d |
|
10 |
|
breq2 |
|
11 |
10
|
anbi2d |
|
12 |
|
eqid |
|
13 |
4 5 9 11 12
|
brab |
|
14 |
3 13
|
bitrdi |
|
15 |
14
|
ad2antrr |
|
16 |
|
subcl |
|
17 |
16
|
biantrurd |
|
18 |
17
|
ancoms |
|
19 |
18
|
adantll |
|
20 |
|
sub32 |
|
21 |
|
subsub4 |
|
22 |
20 21
|
eqtr3d |
|
23 |
22
|
3expb |
|
24 |
23
|
ancoms |
|
25 |
24
|
breq1d |
|
26 |
15 19 25
|
3bitr2d |
|
27 |
26
|
pm5.32da |
|
28 |
27
|
opabbidv |
|
29 |
|
ovex |
|
30 |
29
|
shftfval |
|
31 |
30
|
adantl |
|
32 |
|
addcl |
|
33 |
1
|
shftfval |
|
34 |
32 33
|
syl |
|
35 |
28 31 34
|
3eqtr4d |
|