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图在三种约束条件下的正常全染色
On Proper Total Colorings of Graphs with Three Constraints
【摘要】 设f:V(G)∪E(G)→{1,2,…,k}是简单图G的一个正常k-全染色.令C(f,u)={f(e):e∈Ne(u)},C[f,u]=C(f,u)∪{f(u)},C2[f,u]=C(f,u)∪{f(x):x∈N(u)}∪{f(u)}.N(u)表示顶点u的邻集,Ne(u)表示与顶点u的相关联的边的集合.令C[f;x]={C(f,x);C[f,x];C2[f,x]},对任意的xy∈E(G),G[f;x]≠C[f;y]表示C(f,x)≠C(f,y),C[f,x]≠C[f,y],C2[f,x]≠C3[f,y]同时成立.对任意的边xy∈E(G),如果有C[f;x]≠C[f;y]成立,则称f是图G的一个k-(3)-邻点可区别全染色(简记为(3)-AVDTC).图G的(3)-邻点可区别全染色中最小的颜色数叫做G的(3)-邻点可区别全色数,记为x(3)as″(G).研究了联图,完全二部图的(3)-邻点可区别全染色,得到了它们的(3)-邻点可区别全色数.
【Abstract】 Let f:V(G)∪E(G)→{1,2,…,k} be a proper k-total coloring of a simple graph G.Set C(f,u)={f(e):e∈Ne(u)},C[f,u]=C(f,u)∪ {f(u)},C2[f,u]=C(f,u)∪ {f(x):x∈N(u)} ∪ {f(u)}.令 C[f;x]={C(f,x);C[f,x];C2[f,x]},For each edge xy ∈ E(G),C[f;x]≠ C[f;y]denoted C(f,x)≠ C(f,y),C[f,x]≠ C[f,y],C2[f,x]≠ C2[f,y]holding at the same time.We call f to be a k-(3)-adjacent vertex distinguishing total coloring(k-(3)-AVDTC for short) of G if C[f;x]≠ C[f;y]for each edge xy ∈ E(G).The minimum number of k colors required for which G admits a k-(3)-AVDTC is denoted by X″(3)as(G),and called the(3)-AVDTC chromatic number of G.In this paper,we consider(3)-adjacent vertex distinguishing total coloring of join and complete bipartite graphs.Finally,we obtain their(3)-adjacent vertex distinguishing total chromatic number.
【Key words】 total coloring; vertex distinguishing total colorings; (3)-adjacent vertex distinguishing total colorings;
- 【文献出处】 数学的实践与认识 ,Mathematics in Practice and Theory , 编辑部邮箱 ,2017年01期
- 【分类号】O157.5
- 【下载频次】46