Step |
Hyp |
Ref |
Expression |
1 |
|
iblcn.1 |
|
2 |
1
|
ismbfcn2 |
|
3 |
2
|
anbi1d |
|
4 |
|
3anass |
|
5 |
|
an4 |
|
6 |
3 4 5
|
3bitr4g |
|
7 |
|
eqid |
|
8 |
|
eqid |
|
9 |
|
eqid |
|
10 |
|
eqid |
|
11 |
7 8 9 10 1
|
iblcnlem1 |
|
12 |
1
|
recld |
|
13 |
12
|
iblrelem |
|
14 |
|
3anass |
|
15 |
13 14
|
bitrdi |
|
16 |
1
|
imcld |
|
17 |
16
|
iblrelem |
|
18 |
|
3anass |
|
19 |
17 18
|
bitrdi |
|
20 |
15 19
|
anbi12d |
|
21 |
6 11 20
|
3bitr4d |
|