On chromatic and dichromatic sum equatio
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Yanpei Liu
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Article
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1990
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Elsevier Science
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English
โ 609 KB
This paper provides firstly an exposition on the theory of chromatic sums for rooted planar triangulations founded by W.T. Tutte. Then, the generalization of the theory for rooted nonseparable planar maps is described. Further, a functional equation of the dichromatic sum functions for rooted nonsep