Step |
Hyp |
Ref |
Expression |
1 |
|
grpinvinv.b |
|
2 |
|
grpinvinv.n |
|
3 |
|
eqid |
|
4 |
1 2
|
grpinvcl |
|
5 |
1 2
|
grpinvcl |
|
6 |
|
eqid |
|
7 |
|
eqid |
|
8 |
1 6 7 2
|
grpinvid1 |
|
9 |
8
|
3com23 |
|
10 |
1 6 7 2
|
grpinvid2 |
|
11 |
9 10
|
bitr4d |
|
12 |
11
|
3expb |
|
13 |
|
eqcom |
|
14 |
|
eqcom |
|
15 |
12 13 14
|
3bitr4g |
|
16 |
3 4 5 15
|
f1ocnv2d |
|
17 |
16
|
simprd |
|
18 |
1 2
|
grpinvf |
|
19 |
18
|
feqmptd |
|
20 |
19
|
cnveqd |
|
21 |
18
|
feqmptd |
|
22 |
17 20 21
|
3eqtr4d |
|