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» A branch and cut algorithm for the Steiner problem in graphs
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SIAMCOMP
2010
125views more  SIAMCOMP 2010»
13 years 2 months ago
Approximating Steiner Networks with Node-Weights
The (undirected) Steiner Network problem is: given a graph = ( , ) with edge/node-weights and edge-connectivity requirements { ( , ) : , }, find a minimumweight subgraph of conta...
Zeev Nutov
GECCO
2004
Springer
134views Optimization» more  GECCO 2004»
14 years 21 days ago
Combining a Memetic Algorithm with Integer Programming to Solve the Prize-Collecting Steiner Tree Problem
The prize-collecting Steiner tree problem on a graph with edge costs and vertex profits asks for a subtree minimizing the sum of the total cost of all edges in the subtree plus th...
Gunnar W. Klau, Ivana Ljubic, Andreas Moser, Petra...
ESA
2008
Springer
101views Algorithms» more  ESA 2008»
13 years 9 months ago
Faster Steiner Tree Computation in Polynomial-Space
Given an n-node graph and a subset of k terminal nodes, the NP-hard Steiner tree problem is to compute a minimum-size tree which spans the terminals. All the known algorithms for t...
Fedor V. Fomin, Fabrizio Grandoni, Dieter Kratsch
ESA
2008
Springer
134views Algorithms» more  ESA 2008»
13 years 9 months ago
A Near-Tight Bound for the Online Steiner Tree Problem in Graphs of Bounded Asymmetry
The edge asymmetry of a directed, edge-weighted graph is defined as the maximum ratio of the weight of antiparallel edges in the graph, and can be used as a measure of the heterog...
Spyros Angelopoulos
STOC
2006
ACM
122views Algorithms» more  STOC 2006»
14 years 7 months ago
Hardness of cut problems in directed graphs
Julia Chuzhoy, Sanjeev Khanna