Step |
Hyp |
Ref |
Expression |
1 |
|
dochval.b |
|
2 |
|
dochval.g |
|
3 |
|
dochval.o |
|
4 |
|
dochval.h |
|
5 |
|
elex |
|
6 |
|
fveq2 |
|
7 |
6 4
|
eqtr4di |
|
8 |
|
fveq2 |
|
9 |
8
|
fveq1d |
|
10 |
9
|
fveq2d |
|
11 |
10
|
pweqd |
|
12 |
|
fveq2 |
|
13 |
12
|
fveq1d |
|
14 |
|
fveq2 |
|
15 |
14 3
|
eqtr4di |
|
16 |
|
fveq2 |
|
17 |
16 2
|
eqtr4di |
|
18 |
|
fveq2 |
|
19 |
18 1
|
eqtr4di |
|
20 |
13
|
fveq1d |
|
21 |
20
|
sseq2d |
|
22 |
19 21
|
rabeqbidv |
|
23 |
17 22
|
fveq12d |
|
24 |
15 23
|
fveq12d |
|
25 |
13 24
|
fveq12d |
|
26 |
11 25
|
mpteq12dv |
|
27 |
7 26
|
mpteq12dv |
|
28 |
|
df-doch |
|
29 |
27 28 4
|
mptfvmpt |
|
30 |
5 29
|
syl |
|