The circular chromatic number and the fractional chromatic number are two generalizations of the ordinary chromatic number of a graph.
圆色数和分式色数是图的点色数的两个推广。
Chromatic number and fractional chromatic number are two important parameters of a graph.
分式色数和点色数是图的两个重要参数。
In this paper, Euler's formula and Handshaking lemma is used to obtain the face chromatic number of a planar graph by solving equations.
本文在前人研究的面着色问题基础上，运用欧拉公式和握手定理通过解方程组得到连通平面图的面色数。
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