图的着色问题是图论的重要研究课题之一,分数色数作为正常色数的一个推广在计算机的许多领域中有着重要的应用.本文给出了球面经纬线图以及它的r-冠图的分数色数,分数关联色数和分数全色数.
The issue of coloring is a very important in the graph theory. Fractional coloring as generalized coloring has used in many fields of computer science. This paper gives formulas to compute the fractional chromatic number,fractional incidence chromatic number and fractional total chromatic number of meridian and latitude lines on a sphere and its r-corona graph.