 reserve L for non empty LattStr;
 reserve v64,v65,v66,v67,v103,v3,v102,v101,v100,v2,v1,v0 for Element of L;

theorem ::: trivial
(for v1,v0 holds (v0"/\"(v0"\/"v1))=v0)
implies for v0,v1 holds v0"/\"(v0"\/"v1)=v0;
