Step |
Hyp |
Ref |
Expression |
1 |
|
dochsscl.h |
|
2 |
|
dochsscl.u |
|
3 |
|
dochsscl.v |
|
4 |
|
dochsscl.i |
|
5 |
|
dochsscl.o |
|
6 |
|
dochsscl.k |
|
7 |
|
dochsscl.x |
|
8 |
|
dochsscl.y |
|
9 |
6
|
adantr |
|
10 |
7
|
adantr |
|
11 |
1 2 3 5
|
dochssv |
|
12 |
9 10 11
|
syl2anc |
|
13 |
1 2 4 3
|
dihrnss |
|
14 |
6 8 13
|
syl2anc |
|
15 |
14
|
adantr |
|
16 |
|
simpr |
|
17 |
1 2 3 5
|
dochss |
|
18 |
9 15 16 17
|
syl3anc |
|
19 |
1 2 3 5
|
dochss |
|
20 |
9 12 18 19
|
syl3anc |
|
21 |
8
|
adantr |
|
22 |
1 4 5
|
dochoc |
|
23 |
9 21 22
|
syl2anc |
|
24 |
20 23
|
sseqtrd |
|
25 |
1 2 3 5
|
dochocss |
|
26 |
6 7 25
|
syl2anc |
|
27 |
|
sstr |
|
28 |
26 27
|
sylan |
|
29 |
24 28
|
impbida |
|