| Step |
Hyp |
Ref |
Expression |
| 1 |
|
dvhvadd.h |
|
| 2 |
|
dvhvadd.t |
|
| 3 |
|
dvhvadd.e |
|
| 4 |
|
dvhvadd.u |
|
| 5 |
|
dvhvadd.f |
|
| 6 |
|
dvhvadd.s |
|
| 7 |
|
dvhvadd.p |
|
| 8 |
|
simp1 |
|
| 9 |
|
opelxpi |
|
| 10 |
9
|
3ad2ant2 |
|
| 11 |
|
opelxpi |
|
| 12 |
11
|
3ad2ant3 |
|
| 13 |
1 2 3 4 5 6 7
|
dvhvadd |
|
| 14 |
8 10 12 13
|
syl12anc |
|
| 15 |
|
op1stg |
|
| 16 |
15
|
3ad2ant2 |
|
| 17 |
|
op1stg |
|
| 18 |
17
|
3ad2ant3 |
|
| 19 |
16 18
|
coeq12d |
|
| 20 |
|
op2ndg |
|
| 21 |
20
|
3ad2ant2 |
|
| 22 |
|
op2ndg |
|
| 23 |
22
|
3ad2ant3 |
|
| 24 |
21 23
|
oveq12d |
|
| 25 |
19 24
|
opeq12d |
|
| 26 |
14 25
|
eqtrd |
|