华东师范大学学报(自然科学版) ›› 2010, Vol. 2010 ›› Issue (6): 137-141.

• 应用数学与基础数学 • 上一篇    下一篇

无赋权的LEW嵌入的图

曹 倪, 刘 坭, 任 韩   

  1. 华东师范大学 数学系, 上海 200241
  • 收稿日期:2009-11-01 修回日期:2010-02-01 出版日期:2010-11-25 发布日期:2010-11-25
  • 通讯作者: 任韩

Weighted graphs permitting no LEW-embeddings

CAO Ni, LIU Ni, REN Han   

  1. Department of Mathematics, East China Normal University, Shanghai 200241, China
  • Received:2009-11-01 Revised:2010-02-01 Online:2010-11-25 Published:2010-11-25
  • Contact: REN Han

摘要: 研究网格图G(a,b)(a≥2,b≥2) 和Mobius梯子图Gn(n≥4)赋权的LEW(大边宽度)嵌入问题,证明这两类图分别在环面和射影平面上无赋权的LEW嵌入, 运用拓扑手术方式构造出可定向曲面Sn,和不可定向曲面Nn上的无赋权的LEW嵌入图.

关键词: 网格图, Mobius梯子图, LEW嵌入, 可/不可定向曲面, 网格图, Mobius梯子图, LEW嵌入, 可/不可定向曲面

Abstract: This article studied the LEW (large edge width) embeddability of weighted grid graph G(a,b)(a≥2,b≥2) and the Mobius ladder graph Gn(n≥4) and showed that such two types of weighted graphs have no LEW-embeddings. Based on these two kinds of graphs weighted graphs were constructed which are strongly embedded in Sn and Nh and permit no LEW-embeddings in the same surface they embedded.

Key words: Mobius ladder, LEW~embedding, orientable/non-orientable surface, grid graph, Mobius ladder, LEW~embedding, orientable/non-orientable surface

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