Step |
Hyp |
Ref |
Expression |
1 |
|
ralnex |
|
2 |
|
df-rex |
|
3 |
|
rexnal |
|
4 |
2 3
|
bitr3i |
|
5 |
|
exsimpl |
|
6 |
|
n0 |
|
7 |
5 6
|
sylibr |
|
8 |
4 7
|
sylbir |
|
9 |
8
|
ralimi |
|
10 |
1 9
|
sylbir |
|
11 |
|
kmlem2 |
|
12 |
|
biimt |
|
13 |
12
|
ralimi |
|
14 |
|
ralbi |
|
15 |
13 14
|
syl |
|
16 |
15
|
anbi2d |
|
17 |
16
|
exbidv |
|
18 |
11 17
|
bitr4id |
|
19 |
10 18
|
syl |
|
20 |
19
|
pm5.74i |
|
21 |
|
pm4.64 |
|
22 |
20 21
|
bitri |
|