Step |
Hyp |
Ref |
Expression |
1 |
|
idfuval.i |
|
2 |
|
idfuval.b |
|
3 |
|
idfuval.c |
|
4 |
|
idfuval.h |
|
5 |
|
idfu2nd.x |
|
6 |
|
idfu2nd.y |
|
7 |
|
df-ov |
|
8 |
1 2 3 4
|
idfuval |
|
9 |
8
|
fveq2d |
|
10 |
2
|
fvexi |
|
11 |
|
resiexg |
|
12 |
10 11
|
ax-mp |
|
13 |
10 10
|
xpex |
|
14 |
13
|
mptex |
|
15 |
12 14
|
op2nd |
|
16 |
9 15
|
eqtrdi |
|
17 |
|
simpr |
|
18 |
17
|
fveq2d |
|
19 |
|
df-ov |
|
20 |
18 19
|
eqtr4di |
|
21 |
20
|
reseq2d |
|
22 |
5 6
|
opelxpd |
|
23 |
|
ovex |
|
24 |
|
resiexg |
|
25 |
23 24
|
mp1i |
|
26 |
16 21 22 25
|
fvmptd |
|
27 |
7 26
|
eqtrid |
|