Step |
Hyp |
Ref |
Expression |
1 |
|
psgnfitr.g |
|
2 |
|
psgnfitr.p |
|
3 |
|
psgnfitr.t |
|
4 |
|
eqid |
|
5 |
3 1 2 4
|
symggen2 |
|
6 |
1
|
symggrp |
|
7 |
|
grpmnd |
|
8 |
6 7
|
syl |
|
9 |
|
eqid |
|
10 |
3 1 9
|
symgtrf |
|
11 |
9 4
|
gsumwspan |
|
12 |
8 10 11
|
sylancl |
|
13 |
5 12
|
eqtr3d |
|
14 |
13
|
eleq2d |
|
15 |
|
eqid |
|
16 |
|
ovex |
|
17 |
15 16
|
elrnmpti |
|
18 |
14 17
|
bitrdi |
|