Step |
Hyp |
Ref |
Expression |
1 |
|
oppgval.2 |
|
2 |
|
oppgval.3 |
|
3 |
|
oppgplusfval.4 |
|
4 |
1 2
|
oppgval |
|
5 |
4
|
fveq2i |
|
6 |
1
|
fvexi |
|
7 |
6
|
tposex |
|
8 |
|
plusgid |
|
9 |
8
|
setsid |
|
10 |
7 9
|
mpan2 |
|
11 |
5 10
|
eqtr4id |
|
12 |
|
tpos0 |
|
13 |
8
|
str0 |
|
14 |
12 13
|
eqtr2i |
|
15 |
|
reldmsets |
|
16 |
15
|
ovprc1 |
|
17 |
4 16
|
syl5eq |
|
18 |
17
|
fveq2d |
|
19 |
|
fvprc |
|
20 |
1 19
|
syl5eq |
|
21 |
20
|
tposeqd |
|
22 |
14 18 21
|
3eqtr4a |
|
23 |
11 22
|
pm2.61i |
|
24 |
3 23
|
eqtri |
|