Step |
Hyp |
Ref |
Expression |
1 |
|
gsumws4.0 |
|
2 |
|
gsumws4.1 |
|
3 |
|
s1s3 |
|
4 |
3
|
a1i |
|
5 |
4
|
oveq2d |
|
6 |
|
simpl |
|
7 |
|
simprl |
|
8 |
7
|
s1cld |
|
9 |
|
simprrl |
|
10 |
|
simprrl |
|
11 |
10
|
adantl |
|
12 |
|
simprrr |
|
13 |
12
|
adantl |
|
14 |
9 11 13
|
s3cld |
|
15 |
1 2
|
gsumccat |
|
16 |
6 8 14 15
|
syl3anc |
|
17 |
1
|
gsumws1 |
|
18 |
17
|
ad2antrl |
|
19 |
1 2
|
gsumws3 |
|
20 |
19
|
adantrl |
|
21 |
18 20
|
oveq12d |
|
22 |
5 16 21
|
3eqtrd |
|