关于一类树的优美标号 |
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引用本文: | 刘家保,吕宁宁,余国锋.关于一类树的优美标号[J].张家口农专学报,2010(5):1-4. |
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作者姓名: | 刘家保 吕宁宁 余国锋 |
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作者单位: | 安徽新华学院公共基础部,安徽合肥230088 |
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基金项目: | 安徽省自然科学基金项目(KJ2010B076);安徽新华校级重点教研项目(2009iy014) |
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摘 要: | 设L为简单无向图G的一个顶点标号,L称为图G的优美标号,若L满足以下两条:(1)L为G的顶点集V到{0,1,…,{E|}的一个单射;(2)由L’(e)-|L(u)-L(v)|(其中e—uv)决定的边标号L’是从G的边集E到{0,1,…,|E|}的一个双射.根据优美图的定义,研究优美树的问题中,Rosa猜想所有的树是优美树,研究了一类树Tm,n^h的优美性.
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关 键 词: | 优美标号 优美图 优美树 |
On Graceful Labeling of a Class of Tm,n^h |
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Authors: | LIU Jia-bao LV Ning-ning YU Guo-feng |
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Institution: | (Department of Basic Courses, Anhui Xinhua University, Hefei 230088, Anhui, China) |
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Abstract: | Let L be a vertex labeling of simple graph G, L is a graceful labeling of G if L satisfies the following: (1) L is an injective mapping from V to {0, 1, .., |E| } ; (2) The function obtained by setting L'(e)=|L(u)-L(v)] , wheree:uv, isa bijective function fromE(G) to {1,2, ……,IEI }. According to the graceful graph definition, among the problems of graceful graph, Rosa conjectures that all trees are graceful. In this paper the graceness of a class of Tm,n^h, is dicussed. |
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Keywords: | graceful labeling graceful graph graceful tree |
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