16 search results - page 3 / 4 » Elementary Approximation Algorithms for Prize Collecting Ste... |
ICALP
2009
Springer
14 years 5 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...
FOCS
2004
IEEE
13 years 8 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...
JOIN
2007
13 years 5 months ago
2007
This paper is devoted to the following incremental problem. Initially, a graph and a distinguished subset of vertices, called initial group, are given. This group is connected by ...
COCOON
2008
Springer
13 years 6 months ago
2008
Springer
In this paper, we introduce the generalized capacitated tree-routing problem (GCTR), which is described as follows. Given a connected graph G = (V, E) with a sink s V and a set M...
SODA
2010
ACM
14 years 2 months ago
2010
ACM
The group Steiner problem is a classical network design problem where we are given a graph and a collection of groups of vertices, and want to build a min-cost subgraph that conne...