Step |
Hyp |
Ref |
Expression |
1 |
|
wwlks.v |
|
2 |
|
wwlks.e |
|
3 |
|
df-wwlks |
|
4 |
|
fveq2 |
|
5 |
4 1
|
eqtr4di |
|
6 |
|
wrdeq |
|
7 |
5 6
|
syl |
|
8 |
|
fveq2 |
|
9 |
8 2
|
eqtr4di |
|
10 |
9
|
eleq2d |
|
11 |
10
|
ralbidv |
|
12 |
11
|
anbi2d |
|
13 |
7 12
|
rabeqbidv |
|
14 |
|
id |
|
15 |
1
|
fvexi |
|
16 |
15
|
a1i |
|
17 |
|
wrdexg |
|
18 |
|
rabexg |
|
19 |
16 17 18
|
3syl |
|
20 |
3 13 14 19
|
fvmptd3 |
|
21 |
|
fvprc |
|
22 |
|
fvprc |
|
23 |
1 22
|
syl5eq |
|
24 |
|
wrdeq |
|
25 |
23 24
|
syl |
|
26 |
25
|
eleq2d |
|
27 |
|
0wrd0 |
|
28 |
26 27
|
syl6bb |
|
29 |
|
nne |
|
30 |
29
|
biimpri |
|
31 |
30
|
intnanrd |
|
32 |
28 31
|
syl6bi |
|
33 |
32
|
ralrimiv |
|
34 |
|
rabeq0 |
|
35 |
33 34
|
sylibr |
|
36 |
21 35
|
eqtr4d |
|
37 |
20 36
|
pm2.61i |
|