Step |
Hyp |
Ref |
Expression |
1 |
|
relsdom |
|
2 |
1
|
brrelex2i |
|
3 |
|
reldom |
|
4 |
3
|
brrelex2i |
|
5 |
|
0sdomg |
|
6 |
|
n0 |
|
7 |
|
snssi |
|
8 |
|
df1o2 |
|
9 |
|
0ex |
|
10 |
|
vex |
|
11 |
|
en2sn |
|
12 |
9 10 11
|
mp2an |
|
13 |
8 12
|
eqbrtri |
|
14 |
|
endom |
|
15 |
13 14
|
ax-mp |
|
16 |
|
domssr |
|
17 |
15 16
|
mp3an3 |
|
18 |
17
|
ex |
|
19 |
7 18
|
syl5 |
|
20 |
19
|
exlimdv |
|
21 |
6 20
|
biimtrid |
|
22 |
|
1n0 |
|
23 |
|
dom0 |
|
24 |
22 23
|
nemtbir |
|
25 |
|
breq2 |
|
26 |
24 25
|
mtbiri |
|
27 |
26
|
necon2ai |
|
28 |
21 27
|
impbid1 |
|
29 |
5 28
|
bitrd |
|
30 |
2 4 29
|
pm5.21nii |
|