Step |
Hyp |
Ref |
Expression |
1 |
|
grppropd.1 |
|
2 |
|
grppropd.2 |
|
3 |
|
grppropd.3 |
|
4 |
1 2 3
|
mndpropd |
|
5 |
1 2 3
|
grpidpropd |
|
6 |
5
|
adantr |
|
7 |
3 6
|
eqeq12d |
|
8 |
7
|
anass1rs |
|
9 |
8
|
rexbidva |
|
10 |
9
|
ralbidva |
|
11 |
1
|
rexeqdv |
|
12 |
1 11
|
raleqbidv |
|
13 |
2
|
rexeqdv |
|
14 |
2 13
|
raleqbidv |
|
15 |
10 12 14
|
3bitr3d |
|
16 |
4 15
|
anbi12d |
|
17 |
|
eqid |
|
18 |
|
eqid |
|
19 |
|
eqid |
|
20 |
17 18 19
|
isgrp |
|
21 |
|
eqid |
|
22 |
|
eqid |
|
23 |
|
eqid |
|
24 |
21 22 23
|
isgrp |
|
25 |
16 20 24
|
3bitr4g |
|