Partitioning aweighted tree into subtrees with weights in a given range

Takehiro Ito, Takao Nishizeki, Michael Schröder, Takeaki Uno, Xiao Zhou

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Assume that each vertex of a graph G is assigned a nonnegative integer weight and that l andu are given integers such that 0 ≤ l≤ u. One wishes to partition G into connected components by deleting edges from G so that the total weight of each component is at least l and at most u. Such a partition is called an (l,u)-partition. We deal with three problems to find an (l,u)-partition of a given graph: the minimum partition problem is to find an (l,u)-partition with the minimum number of components; the maximum partition problem is defined analogously; and the p-partition problem is to find an (l,u)-partition with a given number p of components. All these problems are NP-hard even for series-parallel graphs, but are solvable in linear time for paths. In this paper, we present the first polynomial-time algorithm to solve the three problems for arbitrary trees.

本文言語English
ページ(範囲)823-841
ページ数19
ジャーナルAlgorithmica
62
3-4
DOI
出版ステータスPublished - 2012 4 1

ASJC Scopus subject areas

  • コンピュータ サイエンス(全般)
  • コンピュータ サイエンスの応用
  • 応用数学

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