Step |
Hyp |
Ref |
Expression |
1 |
|
isclwwlkn |
|
2 |
|
isclwwlkn |
|
3 |
|
biid |
|
4 |
|
simpl |
|
5 |
|
simpl |
|
6 |
|
id |
|
7 |
|
clwwlkccat |
|
8 |
4 5 6 7
|
syl3an |
|
9 |
1 2 3 8
|
syl3anb |
|
10 |
|
eqid |
|
11 |
10
|
clwwlknwrd |
|
12 |
10
|
clwwlknwrd |
|
13 |
|
ccatlen |
|
14 |
11 12 13
|
syl2an |
|
15 |
|
clwwlknlen |
|
16 |
|
clwwlknlen |
|
17 |
15 16
|
oveqan12d |
|
18 |
14 17
|
eqtrd |
|
19 |
18
|
3adant3 |
|
20 |
|
isclwwlkn |
|
21 |
9 19 20
|
sylanbrc |
|