Step |
Hyp |
Ref |
Expression |
1 |
|
axacnd |
|
2 |
|
19.3v |
|
3 |
2
|
imbi1i |
|
4 |
3
|
2albii |
|
5 |
4
|
exbii |
|
6 |
1 5
|
mpbi |
|
7 |
|
equequ2 |
|
8 |
7
|
bibi2d |
|
9 |
|
elequ2 |
|
10 |
9
|
anbi2d |
|
11 |
|
elequ2 |
|
12 |
|
elequ1 |
|
13 |
11 12
|
anbi12d |
|
14 |
10 13
|
anbi12d |
|
15 |
14
|
cbvexvw |
|
16 |
15
|
bibi1i |
|
17 |
8 16
|
bitrdi |
|
18 |
17
|
albidv |
|
19 |
|
elequ1 |
|
20 |
19
|
anbi1d |
|
21 |
|
elequ1 |
|
22 |
21
|
anbi1d |
|
23 |
20 22
|
anbi12d |
|
24 |
23
|
exbidv |
|
25 |
|
equequ1 |
|
26 |
24 25
|
bibi12d |
|
27 |
26
|
cbvalvw |
|
28 |
18 27
|
bitrdi |
|
29 |
28
|
cbvexvw |
|
30 |
29
|
imbi2i |
|
31 |
30
|
2albii |
|
32 |
31
|
exbii |
|
33 |
6 32
|
mpbir |
|