Step |
Hyp |
Ref |
Expression |
1 |
|
ancom |
|
2 |
|
r19.41v |
|
3 |
1 2
|
bitr4i |
|
4 |
3
|
exbii |
|
5 |
|
eluniab |
|
6 |
|
eluni2 |
|
7 |
6
|
anbi1i |
|
8 |
|
elin |
|
9 |
|
r19.41v |
|
10 |
7 8 9
|
3bitr4i |
|
11 |
|
vex |
|
12 |
11
|
inex1 |
|
13 |
|
eleq2 |
|
14 |
12 13
|
ceqsexv |
|
15 |
|
elin |
|
16 |
14 15
|
bitri |
|
17 |
16
|
rexbii |
|
18 |
|
rexcom4 |
|
19 |
10 17 18
|
3bitr2i |
|
20 |
4 5 19
|
3bitr4ri |
|
21 |
20
|
eqriv |
|