| 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 |
|