| Step |
Hyp |
Ref |
Expression |
| 1 |
|
mapdval.h |
|
| 2 |
|
elex |
|
| 3 |
|
fveq2 |
|
| 4 |
3 1
|
eqtr4di |
|
| 5 |
|
fveq2 |
|
| 6 |
5
|
fveq1d |
|
| 7 |
6
|
fveq2d |
|
| 8 |
6
|
fveq2d |
|
| 9 |
|
fveq2 |
|
| 10 |
9
|
fveq1d |
|
| 11 |
6
|
fveq2d |
|
| 12 |
11
|
fveq1d |
|
| 13 |
10 12
|
fveq12d |
|
| 14 |
10 13
|
fveq12d |
|
| 15 |
14 12
|
eqeq12d |
|
| 16 |
13
|
sseq1d |
|
| 17 |
15 16
|
anbi12d |
|
| 18 |
8 17
|
rabeqbidv |
|
| 19 |
7 18
|
mpteq12dv |
|
| 20 |
4 19
|
mpteq12dv |
|
| 21 |
|
df-mapd |
|
| 22 |
20 21 1
|
mptfvmpt |
|
| 23 |
2 22
|
syl |
|