Step |
Hyp |
Ref |
Expression |
1 |
|
isfin32i |
|
2 |
|
fveq1 |
|
3 |
|
fveq1 |
|
4 |
2 3
|
sseq12d |
|
5 |
4
|
ralbidv |
|
6 |
|
rneq |
|
7 |
6
|
inteqd |
|
8 |
7 6
|
eleq12d |
|
9 |
5 8
|
imbi12d |
|
10 |
9
|
cbvralvw |
|
11 |
|
pweq |
|
12 |
11
|
oveq1d |
|
13 |
12
|
raleqdv |
|
14 |
10 13
|
syl5bb |
|
15 |
14
|
cbvabv |
|
16 |
15
|
isf32lem12 |
|
17 |
1 16
|
mpd |
|
18 |
10
|
abbii |
|
19 |
18
|
fin23lem41 |
|
20 |
17 19
|
impbii |
|
21 |
20
|
eqriv |
|