Description: The meet of an ortholattice element with one equals itself. ( chm1i analog.) (Contributed by NM, 22-May-2012)
Ref | Expression | ||
---|---|---|---|
Hypotheses | olm1.b | |
|
olm1.m | |
||
olm1.u | |
||
Assertion | olm11 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | olm1.b | |
|
2 | olm1.m | |
|
3 | olm1.u | |
|
4 | olop | |
|
5 | 4 | adantr | |
6 | eqid | |
|
7 | eqid | |
|
8 | 6 3 7 | opoc1 | |
9 | 5 8 | syl | |
10 | 9 | oveq2d | |
11 | 1 7 | opoccl | |
12 | 4 11 | sylan | |
13 | eqid | |
|
14 | 1 13 6 | olj01 | |
15 | 12 14 | syldan | |
16 | 10 15 | eqtrd | |
17 | 16 | fveq2d | |
18 | 1 3 | op1cl | |
19 | 5 18 | syl | |
20 | 1 13 2 7 | oldmj4 | |
21 | 19 20 | mpd3an3 | |
22 | 1 7 | opococ | |
23 | 4 22 | sylan | |
24 | 17 21 23 | 3eqtr3d | |