| ON 3-CHOOSABIL ITY OF PL ANE GRAPHSON3 -CHOOSABIL ITY OF PL ANE GRAPHS WITHOUT 6-,7-AND 9-CYCLES |
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| 作者姓名： | Zhang Haihui Xu Baogang School of Math. and Comput. Sci. Nanjing Normal Univ. Nanjing China.
Dept.of Math. Huaiyin Teachers College Huaian China |
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| 作者单位： | Zhang Haihui1，2 Xu Baogang1 School of Math. and Comput. Sci.，Nanjing Normal Univ.，Nanjing 2 1 0 0 97，China.
2 Dept.of Math.，Huaiyin Teachers College，Huaian2 2 30 0 1，China |
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| 基金项目： | supported by the National Natural Science Foundation of China(1 0 0 0 1 0 35) |
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| 摘 要： | § 1 IntroductionAll graphs considered in this paper are finite,simple plane graphs.G=(V,E,F)denotes a plane graph,with V,E and F being the set of vertices,edges and faces of G,respectively.Two vertices u and v are adjacent,denoted by uv∈E,if there is an edge in Ejoining them.A vertex u is incident with an edge e if u is an endvertex of e.Two faces aresaid to be adjacent if they share a common edge.We use b(f) to denote the boundary of aface f.A face is incident with all vertices and e…
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ON 3-CHOOSABIL ITY OF PL ANE GRAPHSON3 -CHOOSABIL ITY OF PL ANE GRAPHS WITHOUT 6-,7-AND 9-CYCLES |
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| Abstract: | |
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| Keywords: | cycle girth choosable plane graph |
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