Step |
Hyp |
Ref |
Expression |
1 |
|
coafval.o |
|
2 |
|
coafval.a |
|
3 |
|
coafval.x |
|
4 |
|
fveq2 |
|
5 |
4 2
|
eqtr4di |
|
6 |
5
|
rabeqdv |
|
7 |
|
fveq2 |
|
8 |
7 3
|
eqtr4di |
|
9 |
8
|
oveqd |
|
10 |
9
|
oveqd |
|
11 |
10
|
oteq3d |
|
12 |
5 6 11
|
mpoeq123dv |
|
13 |
|
df-coa |
|
14 |
2
|
fvexi |
|
15 |
14
|
rabex |
|
16 |
14 15
|
mpoex |
|
17 |
12 13 16
|
fvmpt |
|
18 |
13
|
fvmptndm |
|
19 |
2
|
arwrcl |
|
20 |
19
|
con3i |
|
21 |
20
|
eq0rdv |
|
22 |
|
eqidd |
|
23 |
|
eqidd |
|
24 |
21 22 23
|
mpoeq123dv |
|
25 |
|
mpo0 |
|
26 |
24 25
|
eqtrdi |
|
27 |
18 26
|
eqtr4d |
|
28 |
17 27
|
pm2.61i |
|
29 |
1 28
|
eqtri |
|