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圆色数和分式色数是图的点色数的两个推广.当图的圆色数等于分式色数时, 我们称此图是star-extremal.本文给出了一个定理改进,同时给出了几类具有star-extremal 特征的循环图.
循环图的star-extremal 性质
【摘 要】
：
圆色数和分式色数是图的点色数的两个推广.当图的圆色数等于分式色数时, 我们称此图是star-extremal.本文给出了一个定理改进,同时给出了几类具有star-extremal 特征的循环图
【机 构】
：
东南大学数学系
【出 处】
：
东南大学学报
【发表日期】
：
2004年期
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