Step |
Hyp |
Ref |
Expression |
1 |
|
isubgr3stgr.v |
|
2 |
|
isubgr3stgr.u |
|
3 |
|
isubgr3stgr.c |
|
4 |
|
isubgr3stgr.f |
|
5 |
|
f1oeq2 |
|
6 |
2 5
|
ax-mp |
|
7 |
6
|
biimpi |
|
8 |
7
|
3ad2ant1 |
|
9 |
|
simpl |
|
10 |
9
|
anim2i |
|
11 |
10
|
3adant1 |
|
12 |
|
nbgrnself2 |
|
13 |
12
|
a1i |
|
14 |
|
simp3r |
|
15 |
4
|
f1ounsn |
|
16 |
8 11 13 14 15
|
syl112anc |
|
17 |
1
|
dfclnbgr4 |
|
18 |
17
|
3ad2ant2 |
|
19 |
|
uncom |
|
20 |
18 19
|
eqtrdi |
|
21 |
3 20
|
eqtrid |
|
22 |
21
|
f1oeq2d |
|
23 |
16 22
|
mpbird |
|