Step |
Hyp |
Ref |
Expression |
1 |
|
opltcon3.b |
|
2 |
|
opltcon3.s |
|
3 |
|
opltcon3.o |
|
4 |
|
eqid |
|
5 |
1 4 3
|
oplecon3b |
|
6 |
1 4 3
|
oplecon3b |
|
7 |
6
|
3com23 |
|
8 |
7
|
notbid |
|
9 |
5 8
|
anbi12d |
|
10 |
|
opposet |
|
11 |
1 4 2
|
pltval3 |
|
12 |
10 11
|
syl3an1 |
|
13 |
10
|
3ad2ant1 |
|
14 |
1 3
|
opoccl |
|
15 |
14
|
3adant2 |
|
16 |
1 3
|
opoccl |
|
17 |
16
|
3adant3 |
|
18 |
1 4 2
|
pltval3 |
|
19 |
13 15 17 18
|
syl3anc |
|
20 |
9 12 19
|
3bitr4d |
|