27 search results - page 1 / 6 » An Improved LP-based Approximation for Steiner Tree |
ALGORITHMICA
2005
13 years 4 months ago
2005
Abstract. The Quality of Service Multicast Tree Problem is a generalization of the Steiner tree problem which appears in the context of multimedia multicast and network design. In ...
DAC
2001
ACM
14 years 5 months ago
2001
ACM
This paper presents the concept of flexibility ? a geometric property associated with Steiner trees. Flexibility is related to the routability of the Steiner tree. We present an o...
COCOON
2005
Springer
13 years 10 months ago
2005
Springer
The terminal Steiner tree problem (TST) consists of finding a minimum cost Steiner tree where each terminal is a leaf. We describe a factor 2ρ−ρ/(3ρ−2) approximation algor...
STOC
2010
ACM
13 years 9 months ago
2010
ACM
The Steiner tree problem is one of the most fundamental ÆÈ-hard problems: given a weighted undirected graph and a subset of terminal nodes, find a minimum weight tree spanning ...
ICALP
2009
Springer
14 years 4 months ago
2009
Springer
We improve the approximation ratios for two optimization problems in planar graphs. For node-weighted Steiner tree, a classical network-optimization problem, the best achievable ap...