Step |
Hyp |
Ref |
Expression |
1 |
|
gexcl.1 |
|
2 |
|
gexcl.2 |
|
3 |
|
gexid.3 |
|
4 |
|
gexid.4 |
|
5 |
|
oveq1 |
|
6 |
1 4 3
|
mulg0 |
|
7 |
5 6
|
sylan9eqr |
|
8 |
7
|
adantrr |
|
9 |
|
oveq1 |
|
10 |
9
|
eqeq1d |
|
11 |
10
|
ralbidv |
|
12 |
11
|
elrab |
|
13 |
12
|
simprbi |
|
14 |
|
oveq2 |
|
15 |
14
|
eqeq1d |
|
16 |
15
|
rspcva |
|
17 |
13 16
|
sylan2 |
|
18 |
|
elfvex |
|
19 |
18 1
|
eleq2s |
|
20 |
|
eqid |
|
21 |
1 3 4 2 20
|
gexlem1 |
|
22 |
19 21
|
syl |
|
23 |
8 17 22
|
mpjaodan |
|