Step |
Hyp |
Ref |
Expression |
1 |
|
sltsubsubbd.1 |
|
2 |
|
sltsubsubbd.2 |
|
3 |
|
sltsubsubbd.3 |
|
4 |
|
sltsubsubbd.4 |
|
5 |
|
npcans |
|
6 |
1 3 5
|
syl2anc |
|
7 |
|
npcans |
|
8 |
1 2 7
|
syl2anc |
|
9 |
6 8
|
eqtr4d |
|
10 |
2 3
|
addscomd |
|
11 |
10
|
oveq1d |
|
12 |
2 4
|
subsvald |
|
13 |
12
|
oveq1d |
|
14 |
4
|
negscld |
|
15 |
2 14 3
|
adds32d |
|
16 |
13 15
|
eqtrd |
|
17 |
3 4
|
subsvald |
|
18 |
17
|
oveq1d |
|
19 |
3 14 2
|
adds32d |
|
20 |
18 19
|
eqtrd |
|
21 |
11 16 20
|
3eqtr4d |
|
22 |
9 21
|
breq12d |
|
23 |
1 3
|
subscld |
|
24 |
2 4
|
subscld |
|
25 |
23 24 3
|
sltadd1d |
|
26 |
1 2
|
subscld |
|
27 |
3 4
|
subscld |
|
28 |
26 27 2
|
sltadd1d |
|
29 |
22 25 28
|
3bitr4d |
|