Description: De Morgan's law for meet in a Hilbert lattice. (Contributed by NM, 21-Jun-2004) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | ch0le.1 | |
|
chjcl.2 | |
||
Assertion | chdmm2i | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ch0le.1 | |
|
2 | chjcl.2 | |
|
3 | 1 | choccli | |
4 | 3 2 | chdmm1i | |
5 | 1 | pjococi | |
6 | 5 | oveq1i | |
7 | 4 6 | eqtri | |