Step |
Hyp |
Ref |
Expression |
1 |
|
mbfeqa.1 |
|
2 |
|
mbfeqa.2 |
|
3 |
|
mbfeqa.3 |
|
4 |
|
mbfeqa.4 |
|
5 |
|
mbfeqa.5 |
|
6 |
3
|
fveq2d |
|
7 |
4
|
recld |
|
8 |
5
|
recld |
|
9 |
1 2 6 7 8
|
mbfeqalem2 |
|
10 |
3
|
fveq2d |
|
11 |
4
|
imcld |
|
12 |
5
|
imcld |
|
13 |
1 2 10 11 12
|
mbfeqalem2 |
|
14 |
9 13
|
anbi12d |
|
15 |
4
|
ismbfcn2 |
|
16 |
5
|
ismbfcn2 |
|
17 |
14 15 16
|
3bitr4d |
|