σ-polynomial相关论文
对标定图G的σ-多项式σ(G)有以下基本定理:设G∨H是标定图G与H的联图,则成立σ(G∨H)=σ(G)σ(H).本文对非标定图的σ-多项式给出了这一定理的相应结果,并据......
Let G be a connected graph.We denote by σ(G,x)and δ(G)respectively the σ-polynomial and the edge-density of G,wher δ(G)=|E(G......