Step |
Hyp |
Ref |
Expression |
1 |
|
alral |
|
2 |
1
|
alimi |
|
3 |
|
alral |
|
4 |
2 3
|
syl |
|
5 |
4
|
ralimi |
|
6 |
|
ralcom |
|
7 |
|
ralcom |
|
8 |
7
|
ralbii |
|
9 |
6 8
|
bitri |
|
10 |
5 9
|
sylib |
|
11 |
|
dftr2 |
|
12 |
11
|
ralbii |
|
13 |
|
df-po |
|
14 |
|
epel |
|
15 |
|
epel |
|
16 |
14 15
|
anbi12i |
|
17 |
|
epel |
|
18 |
16 17
|
imbi12i |
|
19 |
|
elirrv |
|
20 |
|
epel |
|
21 |
19 20
|
mtbir |
|
22 |
21
|
biantrur |
|
23 |
18 22
|
bitr3i |
|
24 |
23
|
ralbii |
|
25 |
24
|
2ralbii |
|
26 |
13 25
|
bitr4i |
|
27 |
10 12 26
|
3imtr4i |
|