Step |
Hyp |
Ref |
Expression |
1 |
|
0wlk.v |
|
2 |
|
eqid |
|
3 |
1 2
|
iswlkg |
|
4 |
|
ral0 |
|
5 |
|
hash0 |
|
6 |
5
|
oveq2i |
|
7 |
|
fzo0 |
|
8 |
6 7
|
eqtri |
|
9 |
8
|
raleqi |
|
10 |
4 9
|
mpbir |
|
11 |
10
|
biantru |
|
12 |
5
|
eqcomi |
|
13 |
12
|
oveq2i |
|
14 |
13
|
feq2i |
|
15 |
|
wrd0 |
|
16 |
15
|
biantrur |
|
17 |
14 16
|
bitri |
|
18 |
|
df-3an |
|
19 |
11 17 18
|
3bitr4ri |
|
20 |
3 19
|
bitrdi |
|