144 search results - page 6 / 29 » Improved Approximation Algorithms for Metric Max TSP |
ESA
2003
Springer
14 years 17 days 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 ...
CIAC
2006
Springer
13 years 11 months ago
2006
Springer
Consider a truck running along a road. It picks up a load Li at point i and delivers it at i, carrying at most one load at a time. The speed on the various parts of the road in on...
SIAMCOMP
1998
13 years 7 months ago
1998
It is shown that the minimum cut ratio is within a factor of O(log k) of the maximum concurrent flow for k-commodity flow instances with arbitrary capacities and demands. This im...
TALG
2008
13 years 7 months ago
2008
In this paper, we study the metrics of negative type, which are metrics (V, d) such that d is an Euclidean metric; these metrics are thus also known as " 2-squared" met...
APPROX
2000
Springer
13 years 11 months ago
2000
Springer
Given a graph (directed or undirected) with costs on the edges, and an integer k, we consider the problem of nding a k-node connected spanning subgraph of minimum cost. For the ge...