点击下载:复旦大学:《离散数学》PPT教学课件(赵一鸣)20/28
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Theorem 5.31 Every planar graph with no loop is 4-colourable if and only if its dual is 4-region colourable▪ Theorem 5.31 Every planar graph with no loop is 4-colourable if and only if its dual is 4-region colourable
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点击下载:复旦大学:《离散数学》PPT教学课件(赵一鸣)20/28
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