设G是任意的P阶连通图,用ψ^G(i)(k,p)表示把图G的第i个顶点vi与星图Sk+1的k度点重迭后得到的图(1≤i≤p),给出了图ψ^G(i)(k,p)与星图Sn+1组合而成的两类E^G形图簇,并通过研究这些图簇的伴随多项式的因式分解,进而证明了它们的补图的色等价性定理。
Let G be a connected graph withp vertices. It denotes by ψ^G(i) ( k ,p) the graphs consisting of Sk+1 and G by coinciding the vertex of degree k of Sk+1 with the ith vertex vi of G. We give two kinds of combinatorial graphs of E^G -shape,which by consist of ψ^G(I) (k,p) and star Sn+1 ,By studing the factorizations of adjoint polynomials of these graphs, we prove that characteristics of the chromatically equivalent graphs of their complements.