509 search results - page 4 / 102 » Lower Bounds for Approximation Algorithms for the Steiner Tr... |
STOC
2010
ACM
14 years 5 days ago
2010
ACM
We give the first polynomial-time approximation scheme (PTAS) for the Steiner forest problem on planar graphs and, more generally, on graphs of bounded genus. As a first step, w...
WADS
2007
Springer
14 years 1 months ago
2007
Springer
We present a polynomial-time approximation scheme (PTAS) for the Steiner tree problem with polygonal obstacles in the plane with running time O(n log2 n), where n denotes the numb...
SODA
2008
ACM
13 years 8 months ago
2008
ACM
In this paper, we present two techniques to analyze greedy approximation with nonsubmodular functions restricted submodularity and shifted submodularity. As an application of the ...
ENDM
2010
13 years 7 months ago
2010
We consider a generalization of the Prize Collecting Steiner Tree Problem on a graph with special redundancy requirements on a subset of the customer nodes suitable to model a rea...
WADS
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. A central issue in the design of modern communication networks is the provision of Quality-of-Service (QoS) guarantees at the presence of heterogeneous users. For instanc...