四色问题反例研究与民航空域频率覆盖

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王锦彪,王玮玮,郑芸,王元崑

Research on Counterexamples of 4-colored Problem and Frequency Covering on Civil Aviation's Airspace

WANG Jinbiao1,WANG Weiwei2,ZHENG Yun1,WANG Yuankun1

. 2005, (S1): 9 -10 .