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Approximating Directed Steiner Problems via Tree Embedding
[article]

2016
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arXiv
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pre-print

In the k-edge connected directed Steiner tree (k-DST) problem, we are given a directed graph G on n vertices with edge-costs, a root vertex r, a set of h terminals T and an integer k. The goal is to find a min-cost subgraph H of G that connects r to each terminal t by k edge-disjoint r,t-paths. This problem includes as special cases the well-known directed Steiner tree (DST) problem (the case k = 1) and the group Steiner tree (GST) problem. Despite having been studied and mentioned many times

arXiv:1511.06559v3
fatcat:mt4v3j7oo5hrxhetiypn6gyvpq