Step |
Hyp |
Ref |
Expression |
1 |
|
bnj864.1 |
|
2 |
|
bnj864.2 |
|
3 |
|
bnj864.3 |
|
4 |
|
bnj864.4 |
|
5 |
|
bnj864.5 |
|
6 |
1 2 3
|
bnj852 |
|
7 |
|
df-ral |
|
8 |
7
|
imbi2i |
|
9 |
|
19.21v |
|
10 |
|
impexp |
|
11 |
|
df-3an |
|
12 |
11
|
bicomi |
|
13 |
12
|
imbi1i |
|
14 |
10 13
|
bitr3i |
|
15 |
14
|
albii |
|
16 |
8 9 15
|
3bitr2i |
|
17 |
6 16
|
mpbi |
|
18 |
17
|
spi |
|
19 |
5
|
eubii |
|
20 |
18 4 19
|
3imtr4i |
|