...
首页> 外文期刊>Discrete Applied Mathematics >Dynamic programming and planarity: Improved tree-decomposition based algorithms
【24h】

Dynamic programming and planarity: Improved tree-decomposition based algorithms

机译:动态编程和平面性:改进的基于树分解的算法

获取原文
获取原文并翻译 | 示例
           

摘要

We study some structural properties for tree-decompositions of 2-connected planar graphs that we use to improve upon the runtime of tree-decomposition based dynamic programming approaches for several NP-hard planar graph problems. E.g., we derive the fastest algorithm for PLANAR DOMINATING SET Of runtime 3(tw) . n(O(1)), when we take the width tw of a given tree-decomposition as the measure for the exponential worst case behavior. We also introduce a tree-decomposition based approach to solve non-local problems efficiently, such as PLANAR HAMILTONIAN CYCLE in runtime 6(tw) . n(O(1)). From any input tree-decomposition of a 2-connected planar graph, one computes in time O(nm) a tree-decomposition with geometric properties, which decomposes the plane into disks, and where the graph separators form Jordan curves in the plane.
机译:我们研究了2个连通平面图的树分解的一些结构特性,这些结构特性用于改进基于树分解的动态规划方法的运行时间,从而解决了几个NP硬平面图问题。例如,我们导出了运行时3(tw)的平面定域集的最快算法。 n(O(1)),当我们将给定树分解的宽度tw作为指数最坏情况行为的度量时。我们还介绍了一种基于树分解的方法来有效解决非局部问题,例如运行时6(tw)中的平面哈密顿循环。 n(O(1))。从2个连接的平面图的任何输入树分解中,可以及时计算出具有几何特性的树分解O(nm),该分解将平面分解为磁盘,并且图形分隔符在平面中形成约旦曲线。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号