509 search results - page 11 / 102 » Lower Bounds for Approximation Algorithms for the Steiner Tr... |
SPAA
2004
ACM
14 years 23 days ago
2004
ACM
Given a general graph G, a fundamental problem is to find a spanning tree H that best approximates G by some measure. Often this measure is some combination of the congestion and...
IPCO
2008
13 years 8 months ago
2008
Abstract. Determining the integrality gap of the bidirected cut relaxation for the metric Steiner tree problem, and exploiting it algorithmically, is a long-standing open problem. ...
ESA
2008
Springer
13 years 9 months ago
2008
Springer
Abstract. We study two-stage robust variants of combinatorial optimization problems like Steiner tree, Steiner forest, and uncapacitated facility location. The robust optimization ...
COMPGEOM
1992
ACM
13 years 11 months ago
1992
ACM
Suppose we are given a sequence of n points in the Euclidean plane, and our objective is to construct, on-line, a connected graph that connects all of them, trying to minimize the...
COCOON
2008
Springer
13 years 9 months ago
2008
Springer
In this paper, we introduce the generalized capacitated tree-routing problem (GCTR), which is described as follows. Given a connected graph G = (V, E) with a sink s V and a set M...