Step |
Hyp |
Ref |
Expression |
1 |
|
neips.1 |
|
2 |
1
|
clsss3 |
|
3 |
2
|
sseld |
|
4 |
3
|
impr |
|
5 |
1
|
isneip |
|
6 |
4 5
|
syldan |
|
7 |
|
3anass |
|
8 |
1
|
clsndisj |
|
9 |
7 8
|
sylanbr |
|
10 |
9
|
anassrs |
|
11 |
10
|
adantllr |
|
12 |
11
|
adantrr |
|
13 |
|
ssdisj |
|
14 |
13
|
ex |
|
15 |
14
|
necon3d |
|
16 |
15
|
ad2antll |
|
17 |
12 16
|
mpd |
|
18 |
17
|
rexlimdva2 |
|
19 |
18
|
expimpd |
|
20 |
6 19
|
sylbid |
|
21 |
20
|
exp32 |
|
22 |
21
|
imp43 |
|