Step |
Hyp |
Ref |
Expression |
1 |
|
gropd.g |
|
2 |
|
gropd.v |
|
3 |
|
gropd.e |
|
4 |
|
opex |
|
5 |
4
|
a1i |
|
6 |
|
opvtxfv |
|
7 |
|
opiedgfv |
|
8 |
6 7
|
jca |
|
9 |
2 3 8
|
syl2anc |
|
10 |
|
nfcv |
|
11 |
|
nfv |
|
12 |
|
nfsbc1v |
|
13 |
11 12
|
nfim |
|
14 |
|
fveqeq2 |
|
15 |
|
fveqeq2 |
|
16 |
14 15
|
anbi12d |
|
17 |
|
sbceq1a |
|
18 |
16 17
|
imbi12d |
|
19 |
10 13 18
|
spcgf |
|
20 |
5 1 9 19
|
syl3c |
|