On the full and bottleneck full Steiner tree problems

  • Authors:
  • Yen Hung Chen;Chin Lung Lu;Chuan Yi Tang

  • Affiliations:
  • Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan, R.O.C;Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan, R.O.C;Department of Computer Science, National Tsing Hua University, Hsinchu, Taiwan, R.O.C

  • Venue:
  • COCOON'03 Proceedings of the 9th annual international conference on Computing and combinatorics
  • Year:
  • 2003

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Abstract

Given a graph G = (V, E) with a length function on edges and a subset R of V, the full Steiner tree is defined to be a Steiner tree in G with all the vertices of R as its leaves. Then the full Steiner tree problem is to find a full Steiner tree in G with minimum length, and the bottleneck full Steiner tree problem is to find a full Steiner tree T in G such that the length of the largest edge in T is minimized. In this paper, we present a new approximation algorithm with performance ratio 2ρ for the full Steiner tree problem, where ρ is the best-known performance ratio for the Steiner tree problem. Moreover, we give an exact algorithm of O(|E| log |E|) time to solve the bottleneck full Steiner tree problem.