摘要
图G的强边着色是正常边着色且任何长为3的路的边不着双色.图G的强边色数是G的所有强边着色中使用色数的最小者,记为χ's(G).证明了如果图G是平面图且满足g(G)≥14,则χ's(G)≤︱5Δ2-2Δ+1/4︱,其中g(G)表示图G的围长.
A strong edge coloring of a graph G is a proper edge coloring such that no two edges with the same color lie on a path of length 3.The strong edge chromatic number of G is the smallest number of colors required to obtain a strong edge coloring of G,denoted by χ′s(G).We prove that if graph G is planar and g(G)≥14,then χ′s(G)≤ [5Δ2-2Δ+1/4] colors,g(G) indicate the girth of G.
出处
《重庆工商大学学报(自然科学版)》
2011年第2期122-124,共3页
Journal of Chongqing Technology and Business University:Natural Science Edition
关键词
强边着色
边着色
平面图
strong edge coloring
edge coloring
planar graphs