Step |
Hyp |
Ref |
Expression |
1 |
|
predel |
|
2 |
|
elpredg |
|
3 |
2
|
adantll |
|
4 |
|
potr |
|
5 |
4
|
3exp2 |
|
6 |
5
|
com24 |
|
7 |
6
|
imp31 |
|
8 |
7
|
com13 |
|
9 |
8
|
ex |
|
10 |
9
|
com14 |
|
11 |
3 10
|
sylbid |
|
12 |
11
|
ex |
|
13 |
12
|
com23 |
|
14 |
13
|
3imp |
|
15 |
14
|
imdistand |
|
16 |
|
vex |
|
17 |
16
|
elpred |
|
18 |
17
|
3ad2ant3 |
|
19 |
16
|
elpred |
|
20 |
19
|
adantl |
|
21 |
20
|
3ad2ant1 |
|
22 |
15 18 21
|
3imtr4d |
|
23 |
22
|
ssrdv |
|
24 |
23
|
3exp |
|
25 |
1 24
|
mpdi |
|