447 search results - page 19 / 90 » Approximation Algorithms for Directed Steiner Problems |
SIAMDM
2008
13 years 8 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...
SODA
1998
ACM
13 years 9 months ago
1998
ACM
Given a planar graph on n nodes with costs weights on its edges, de ne the distance between nodes i and j as the length of the shortest path between i and j. Consider this as an i...
ICALP
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. This paper considers the Steiner tree problem in the model of twostage stochastic optimization with recourse. This model, the focus of much recent research [1–4], tries...
CORR
2008
Springer
13 years 8 months ago
2008
Springer
A path from s to t on a polyhedral terrain is descending if the height of a point p never increases while we move p along the path from s to t. No efficient algorithm is known to ...
ESA
2007
Springer
14 years 2 months ago
2007
Springer
We consider the real-world problem of extending a given infrastructure network in order to connect new customers. By representing the infrastructure by a single root node, this pro...