ABSTRACT
Suppose ,A B EMii I jj J∑ ∑ ∈∈ ∈ , and M , ,( )∧ ∨ is completely distributive lattice, “x” represents the relationship of “and” or “or”, we can get the following
∑i∈I Ai ∨ ∑ j∈J Bj= ∑k∈I⌊⌋J Ck (2)
In formula (2), (3) “∪” indicates the relationship between I and J which is neither mixed nor aggregated. When u∈I, Cu=Au will be concluded; when u∈J, Cu=Bu.