Step |
Hyp |
Ref |
Expression |
1 |
|
lcdval.h |
|
2 |
|
elex |
|
3 |
|
fveq2 |
|
4 |
3 1
|
eqtr4di |
|
5 |
|
fveq2 |
|
6 |
5
|
fveq1d |
|
7 |
6
|
fveq2d |
|
8 |
6
|
fveq2d |
|
9 |
|
fveq2 |
|
10 |
9
|
fveq1d |
|
11 |
6
|
fveq2d |
|
12 |
11
|
fveq1d |
|
13 |
10 12
|
fveq12d |
|
14 |
10 13
|
fveq12d |
|
15 |
14 12
|
eqeq12d |
|
16 |
8 15
|
rabeqbidv |
|
17 |
7 16
|
oveq12d |
|
18 |
4 17
|
mpteq12dv |
|
19 |
|
df-lcdual |
|
20 |
18 19 1
|
mptfvmpt |
|
21 |
2 20
|
syl |
|