Step |
Hyp |
Ref |
Expression |
1 |
|
frgrwopreg.v |
|
2 |
|
frgrwopreg.d |
|
3 |
|
frgrwopreg.a |
|
4 |
|
frgrwopreg.b |
|
5 |
|
n0 |
|
6 |
3
|
rabeq2i |
|
7 |
1
|
vdgfrgrgt2 |
|
8 |
7
|
imp |
|
9 |
|
breq2 |
|
10 |
2
|
fveq1i |
|
11 |
10
|
breq2i |
|
12 |
9 11
|
syl6bb |
|
13 |
12
|
eqcoms |
|
14 |
8 13
|
syl5ibrcom |
|
15 |
14
|
exp31 |
|
16 |
15
|
com14 |
|
17 |
16
|
impcom |
|
18 |
6 17
|
sylbi |
|
19 |
18
|
exlimiv |
|
20 |
5 19
|
sylbi |
|
21 |
20
|
3imp31 |
|