| Step |
Hyp |
Ref |
Expression |
| 1 |
|
dvaset.h |
|
| 2 |
|
elex |
|
| 3 |
|
fveq2 |
|
| 4 |
3 1
|
eqtr4di |
|
| 5 |
|
fveq2 |
|
| 6 |
5
|
fveq1d |
|
| 7 |
6
|
opeq2d |
|
| 8 |
|
eqidd |
|
| 9 |
6 6 8
|
mpoeq123dv |
|
| 10 |
9
|
opeq2d |
|
| 11 |
|
fveq2 |
|
| 12 |
11
|
fveq1d |
|
| 13 |
12
|
opeq2d |
|
| 14 |
7 10 13
|
tpeq123d |
|
| 15 |
|
fveq2 |
|
| 16 |
15
|
fveq1d |
|
| 17 |
|
eqidd |
|
| 18 |
16 6 17
|
mpoeq123dv |
|
| 19 |
18
|
opeq2d |
|
| 20 |
19
|
sneqd |
|
| 21 |
14 20
|
uneq12d |
|
| 22 |
4 21
|
mpteq12dv |
|
| 23 |
|
df-dveca |
|
| 24 |
22 23 1
|
mptfvmpt |
|
| 25 |
2 24
|
syl |
|