Step |
Hyp |
Ref |
Expression |
1 |
|
ssel |
|
2 |
1
|
alrimiv |
|
3 |
2
|
alrimivv |
|
4 |
|
elvvv |
|
5 |
|
eleq1 |
|
6 |
|
eleq1 |
|
7 |
5 6
|
imbi12d |
|
8 |
7
|
biimprcd |
|
9 |
8
|
alimi |
|
10 |
|
19.23v |
|
11 |
9 10
|
sylib |
|
12 |
11
|
2alimi |
|
13 |
|
19.23vv |
|
14 |
12 13
|
sylib |
|
15 |
4 14
|
syl5bi |
|
16 |
15
|
com23 |
|
17 |
16
|
a2d |
|
18 |
17
|
alimdv |
|
19 |
|
dfss2 |
|
20 |
|
dfss2 |
|
21 |
18 19 20
|
3imtr4g |
|
22 |
21
|
com12 |
|
23 |
3 22
|
impbid2 |
|