30 search results - page 2 / 6 » Approximating Fault-Tolerant Group-Steiner Problems |
SODA
2003
ACM
13 years 6 months ago
2003
ACM
The natural relaxation for the Group Steiner Tree problem, as well as for its generalization, the Directed Steiner Tree problem, is a flow-based linear programming relaxation. We...
ICALP
2005
Springer
13 years 10 months ago
2005
Springer
In the Euclidean group Traveling Salesman Problem (TSP), we are given a set of points P in the plane and a set of m connected regions, each containing at least one point of P. We w...
APPROX
2000
Springer
13 years 9 months ago
2000
Springer
We consider a fault tolerant version of the metric facility location problem in which every city, j, is required to be connected to rj facilities. We give the first non-trivial ap...
ESA
2003
Springer
13 years 10 months ago
2003
Springer
We prove that various geometric covering problems, related to the Travelling Salesman Problem cannot be efficiently approximated to within any constant factor unless P = NP. This ...
INFOCOM
2007
IEEE
13 years 11 months ago
2007
IEEE
— Two fundamental functions of the sensor nodes in a wireless sensor network are to sense its environment and to transmit sensed information to a basestation. One approach to pro...