106 search results - page 3 / 22 » On the Approximability of the Steiner Tree Problem in Phylog... |
ICALP
2009
Springer
14 years 7 months ago
2009
Springer
We improve the approximation ratios for two optimization problems in planar graphs. For node-weighted Steiner tree, a classical network-optimization problem, the best achievable ap...
APPROX
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. In this paper we introduce a new technique for approximation schemes for geometrical optimization problems. As an example problem, we consider the following variant of th...
FSTTCS
2003
Springer
14 years 20 days ago
2003
Springer
The Covering Steiner problem is a common generalization of the k-MST and Group Steiner problems. An instance of the Covering Steiner problem consists of an undirected graph with ed...
FOCS
2004
IEEE
13 years 11 months ago
2004
IEEE
Given an undirected multigraph G and a subset of vertices S V (G), the STEINER TREE PACKING problem is to find a largest collection of edge-disjoint trees that each connects S. T...
STOC
2010
ACM
14 years 9 days ago
2010
ACM
The Steiner tree problem is one of the most fundamental ÆÈ-hard problems: given a weighted undirected graph and a subset of terminal nodes, find a minimum weight tree spanning ...