Step |
Hyp |
Ref |
Expression |
1 |
|
fveq2 |
|
2 |
1
|
opeq2d |
|
3 |
1
|
adantr |
|
4 |
|
simpl |
|
5 |
4
|
oveq2d |
|
6 |
5
|
sumeq1d |
|
7 |
1 3 6
|
mpoeq123dva |
|
8 |
7
|
opeq2d |
|
9 |
2 8
|
preq12d |
|
10 |
1
|
adantr |
|
11 |
10
|
rabeqdv |
|
12 |
1 3 11
|
mpoeq123dva |
|
13 |
12
|
opeq2d |
|
14 |
3
|
difeq1d |
|
15 |
1
|
rabeqdv |
|
16 |
15
|
adantr |
|
17 |
1 14 16
|
mpoeq123dva |
|
18 |
17
|
opeq2d |
|
19 |
13 18
|
preq12d |
|
20 |
9 19
|
uneq12d |
|
21 |
|
df-eeng |
|
22 |
|
prex |
|
23 |
|
prex |
|
24 |
22 23
|
unex |
|
25 |
20 21 24
|
fvmpt |
|