Step |
Hyp |
Ref |
Expression |
1 |
|
djhval.h |
|
2 |
|
elex |
|
3 |
|
fveq2 |
|
4 |
3 1
|
eqtr4di |
|
5 |
|
fveq2 |
|
6 |
5
|
fveq1d |
|
7 |
6
|
fveq2d |
|
8 |
7
|
pweqd |
|
9 |
|
fveq2 |
|
10 |
9
|
fveq1d |
|
11 |
10
|
fveq1d |
|
12 |
10
|
fveq1d |
|
13 |
11 12
|
ineq12d |
|
14 |
10 13
|
fveq12d |
|
15 |
8 8 14
|
mpoeq123dv |
|
16 |
4 15
|
mpteq12dv |
|
17 |
|
df-djh |
|
18 |
16 17 1
|
mptfvmpt |
|
19 |
2 18
|
syl |
|