120 search results - page 1 / 24 » Improved Steiner tree approximation in graphs |
ICALP
2009
Springer
14 years 4 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...
STOC
2010
ACM
13 years 9 months 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 ...
SODA
2000
ACM
13 years 5 months ago
2000
ACM
The Steiner tree problem in weighted graphs seeks a minimum weight connected subgraph containing a given subset of the vertices terminals. We present a new polynomial-time heurist...
FSTTCS
2003
Springer
13 years 9 months 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...
COCOA
2009
Springer
13 years 11 months ago
2009
Springer
Abstract. The node-weighted Steiner tree problem is a variation of classical Steiner minimum tree problem. Given a graph G = (V, E) with node weight function C : V → R+ and a sub...