Step |
Hyp |
Ref |
Expression |
1 |
|
neii2 |
|
2 |
|
opnneiss |
|
3 |
2
|
3expb |
|
4 |
3
|
adantrrr |
|
5 |
4
|
adantlr |
|
6 |
|
simplll |
|
7 |
|
simpll |
|
8 |
|
simpr |
|
9 |
|
eqid |
|
10 |
9
|
neii1 |
|
11 |
10
|
adantr |
|
12 |
9
|
opnssneib |
|
13 |
7 8 11 12
|
syl3anc |
|
14 |
13
|
biimpa |
|
15 |
14
|
anasss |
|
16 |
15
|
adantr |
|
17 |
|
simpr |
|
18 |
|
neiss |
|
19 |
6 16 17 18
|
syl3anc |
|
20 |
19
|
ex |
|
21 |
20
|
adantrrl |
|
22 |
21
|
alrimiv |
|
23 |
1 5 22
|
reximssdv |
|