| Step |
Hyp |
Ref |
Expression |
| 1 |
|
isubgredg.v |
|
| 2 |
|
isubgredg.e |
|
| 3 |
|
isubgredg.h |
|
| 4 |
|
isubgredg.i |
|
| 5 |
3
|
fveq2i |
|
| 6 |
|
eqid |
|
| 7 |
1 6
|
isubgriedg |
|
| 8 |
5 7
|
eqtrid |
|
| 9 |
8
|
rneqd |
|
| 10 |
|
resss |
|
| 11 |
|
rnss |
|
| 12 |
10 11
|
mp1i |
|
| 13 |
9 12
|
eqsstrd |
|
| 14 |
|
edgval |
|
| 15 |
4 14
|
eqtri |
|
| 16 |
|
edgval |
|
| 17 |
2 16
|
eqtri |
|
| 18 |
13 15 17
|
3sstr4g |
|