Step |
Hyp |
Ref |
Expression |
1 |
|
vtxdushgrfvedg.v |
|
2 |
|
vtxdushgrfvedg.e |
|
3 |
|
vtxdushgrfvedg.d |
|
4 |
|
eqid |
|
5 |
1 4 3
|
vtxd0nedgb |
|
6 |
5
|
adantl |
|
7 |
2
|
eleq2i |
|
8 |
4
|
uhgredgiedgb |
|
9 |
7 8
|
syl5bb |
|
10 |
9
|
adantr |
|
11 |
|
prid1g |
|
12 |
|
eleq2 |
|
13 |
11 12
|
syl5ibcom |
|
14 |
13
|
adantl |
|
15 |
14
|
reximdv |
|
16 |
10 15
|
sylbid |
|
17 |
16
|
rexlimdvw |
|
18 |
17
|
con3d |
|
19 |
6 18
|
sylbid |
|
20 |
19
|
3impia |
|