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四色定理
释义
四色定理
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four color theorem
四色定理
设图G是一个平面图,图G的面染色(face coloring)是从G的面集合到某个给定颜色集合的映射。进一步,如果图G的某个面染色的颜色集合中有k种颜色,那么称这个面染色为k-面染色(k-face coloring)。图G的k-面染色称为正常k-面染色(proper k-face coloring),如果具有公共边的面染不同颜色,此时称图G是k-面可染的(proper k-face colorable)。四色定理的内容如下:每个无割边的平面图都是4-面可染的。
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>组合数学、组合设计与图论>图论>释义
four-color theorem
四色定理
four-color theorem
四色定理
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