Beyond Metric Embedding: Approximating Group Steiner Trees on Bounded Treewidth Graphs
SODA, pp. 737-751, 2017.
The Group Steiner Tree (GST) problem is a classical problem in combinatorial optimization and theoretical computer science. In the Edge-Weighted Group Steiner Tree (EW-GST) problem, we are given an undirected graph G = (V, E) on n vertices with edge costs c : E → ℝ≥ 0, a source vertex s and a collection of subsets of vertices, called grou...More
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