Step |
Hyp |
Ref |
Expression |
1 |
|
hvnegdi.1 |
|
2 |
|
hvnegdi.2 |
|
3 |
|
hvaddcan.3 |
|
4 |
|
oveq1 |
|
5 |
|
neg1cn |
|
6 |
5 1
|
hvmulcli |
|
7 |
1 2 6
|
hvadd32i |
|
8 |
1
|
hvnegidi |
|
9 |
8
|
oveq1i |
|
10 |
2
|
hvaddid2i |
|
11 |
7 9 10
|
3eqtri |
|
12 |
1 3 6
|
hvadd32i |
|
13 |
8
|
oveq1i |
|
14 |
3
|
hvaddid2i |
|
15 |
12 13 14
|
3eqtri |
|
16 |
4 11 15
|
3eqtr3g |
|
17 |
|
oveq2 |
|
18 |
16 17
|
impbii |
|