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 |
|