Step |
Hyp |
Ref |
Expression |
1 |
|
pmapfval.b |
|
2 |
|
pmapfval.l |
|
3 |
|
pmapfval.a |
|
4 |
|
pmapfval.m |
|
5 |
|
elex |
|
6 |
|
fveq2 |
|
7 |
6 1
|
eqtr4di |
|
8 |
|
fveq2 |
|
9 |
8 3
|
eqtr4di |
|
10 |
|
fveq2 |
|
11 |
10 2
|
eqtr4di |
|
12 |
11
|
breqd |
|
13 |
9 12
|
rabeqbidv |
|
14 |
7 13
|
mpteq12dv |
|
15 |
|
df-pmap |
|
16 |
14 15 1
|
mptfvmpt |
|
17 |
4 16
|
syl5eq |
|
18 |
5 17
|
syl |
|