Step |
Hyp |
Ref |
Expression |
1 |
|
msubffval.v |
|
2 |
|
msubffval.r |
|
3 |
|
msubffval.s |
|
4 |
|
msubffval.e |
|
5 |
|
msubffval.o |
|
6 |
|
elex |
|
7 |
|
fveq2 |
|
8 |
7 2
|
eqtr4di |
|
9 |
|
fveq2 |
|
10 |
9 1
|
eqtr4di |
|
11 |
8 10
|
oveq12d |
|
12 |
|
fveq2 |
|
13 |
12 4
|
eqtr4di |
|
14 |
|
fveq2 |
|
15 |
14 5
|
eqtr4di |
|
16 |
15
|
fveq1d |
|
17 |
16
|
fveq1d |
|
18 |
17
|
opeq2d |
|
19 |
13 18
|
mpteq12dv |
|
20 |
11 19
|
mpteq12dv |
|
21 |
|
df-msub |
|
22 |
|
ovex |
|
23 |
22
|
mptex |
|
24 |
20 21 23
|
fvmpt |
|
25 |
3 24
|
syl5eq |
|
26 |
6 25
|
syl |
|