447 search results - page 22 / 90 » Approximation Algorithms for Directed Steiner Problems |
ICCS
2009
Springer
14 years 3 months ago
2009
Springer
Recent years have seen growth in the number of algorithms designed to solve challenging simulation-based nonlinear optimization problems. One such algorithm is the Trust-Region Par...
ICALP
2010
Springer
14 years 1 months ago
2010
Springer
Some of the currently best-known approximation algorithms for network design are based on random sampling. One of the key steps of such algorithms is connecting a set of source nod...
SODA
2008
ACM
13 years 10 months ago
2008
ACM
In this paper we consider the orienteering problem in undirected and directed graphs and obtain improved approximation algorithms. The point to point-orienteering-problem is the f...
STOC
2006
ACM
14 years 2 months ago
2006
ACM
We show that for any constant ε > 0, there is no Ω(log1−ε M)approximation algorithm for the directed congestion minimization problem on networks of size M unless NP ⊆ Z...
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...