Step |
Hyp |
Ref |
Expression |
1 |
|
0sno |
|
2 |
|
mulsval |
|
3 |
1 2
|
mpan2 |
|
4 |
|
rex0 |
|
5 |
|
left0s |
|
6 |
5
|
rexeqi |
|
7 |
4 6
|
mtbir |
|
8 |
7
|
a1i |
|
9 |
8
|
nrex |
|
10 |
9
|
abf |
|
11 |
|
rex0 |
|
12 |
|
right0s |
|
13 |
12
|
rexeqi |
|
14 |
11 13
|
mtbir |
|
15 |
14
|
a1i |
|
16 |
15
|
nrex |
|
17 |
16
|
abf |
|
18 |
10 17
|
uneq12i |
|
19 |
|
un0 |
|
20 |
18 19
|
eqtri |
|
21 |
|
rex0 |
|
22 |
12
|
rexeqi |
|
23 |
21 22
|
mtbir |
|
24 |
23
|
a1i |
|
25 |
24
|
nrex |
|
26 |
25
|
abf |
|
27 |
|
rex0 |
|
28 |
5
|
rexeqi |
|
29 |
27 28
|
mtbir |
|
30 |
29
|
a1i |
|
31 |
30
|
nrex |
|
32 |
31
|
abf |
|
33 |
26 32
|
uneq12i |
|
34 |
33 19
|
eqtri |
|
35 |
20 34
|
oveq12i |
|
36 |
|
df-0s |
|
37 |
35 36
|
eqtr4i |
|
38 |
3 37
|
eqtrdi |
|