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