141 search results - page 12 / 29 » Approximating Steiner trees in graphs with restricted weight... |
SODA
2010
ACM
14 years 5 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...
SIAMDM
2008
13 years 7 months ago
2008
A well-known theorem of Nash-Williams and Tutte gives a necessary and sufficient condition for the existence of k edge-disjoint spanning trees in an undirected graph. A corollary o...
ISAAC
1998
Springer
13 years 12 months ago
1998
Springer
Let G = (V; E; w) be an undirected graph with nonnegative edge length function w and nonnegative vertex weight function r. The optimal product-requirement communication spanning t...
STOC
2003
ACM
14 years 8 months ago
2003
ACM
In this paper, we show that any n point metric space can be embedded into a distribution over dominating tree metrics such that the expected stretch of any edge is O(log n). This ...
SWAT
1994
Springer
13 years 11 months ago
1994
Springer
We give linear-time algorithms for a class of parametric search problems on weighted graphs of bounded tree-width. We also discuss the implications of our results to approximate p...