Journal
OPERATIONS RESEARCH LETTERS
Volume 31, Issue 1, Pages 12-20Publisher
ELSEVIER
DOI: 10.1016/S0167-6377(02)00185-2
Keywords
Steiner problem; relaxation; linear programming
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The bottleneck of the state-of-the-art algorithms for geometric Steiner problems is usually the concatenation phase, where the prevailing approach treats the generated full Steiner trees as edges of a hypergraph and uses an LP-relaxation of the minimum spanning tree in hypergraph (MSTH) problem. We study this original and some new equivalent relaxations of this problem and clarify their relations to all classical relaxations of the Steiner problem. In an experimental study, an algorithm of ours which is designed for general graphs turns out to be an efficient alternative to the MSTH approach. (C) 2002 Elsevier Science B.V. All rights reserved.
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