Step |
Hyp |
Ref |
Expression |
1 |
|
relxp |
|
2 |
|
relopabv |
|
3 |
|
df-clab |
|
4 |
|
df-clab |
|
5 |
3 4
|
anbi12i |
|
6 |
|
sban |
|
7 |
|
sbsbc |
|
8 |
|
sbv |
|
9 |
8
|
anbi1i |
|
10 |
6 7 9
|
3bitr3i |
|
11 |
10
|
sbbii |
|
12 |
|
sbsbc |
|
13 |
|
sban |
|
14 |
|
sbv |
|
15 |
14
|
anbi2i |
|
16 |
13 15
|
bitri |
|
17 |
11 12 16
|
3bitr3i |
|
18 |
5 17
|
bitr4i |
|
19 |
|
brxp |
|
20 |
|
eqid |
|
21 |
20
|
brabsb |
|
22 |
18 19 21
|
3bitr4i |
|
23 |
1 2 22
|
eqbrriv |
|