In this paper,the minus total domatic number was first defined.
定义了图的负全控制划分数,得到了负全控制划分数的存在性和其与边数、最小度的关系,并给出其在部分完全图上的准确值和在一般图上的一个上界。
Thus,the upper minus total dominationΓ_t~-(G)is defined as follows:Γ_t~-(G)=max{w(f)|f is minimal minus total dominating functon of G}.
图的上负全控制数Γ_t~-(G)=max{w(f)|f是G的极小负全控制函数},其中w(f)=sum from v∈V(G)f(v)。
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