Given an undirected and connected graph G = (V, E) and two vertices s, t ∈ V, a vertex subset S that separates s and t is called an s-t separator, and an s-t separator is called minimal if no proper subset of S separates s and t. In this paper, we consider finding a minimal s-t separator with maximum weight on a vertex-weighted graph. We first prove that this problem is NP-hard. Then, we propose an twO(tw) n-time deterministic algorithm based on tree decompositions. Moreover, we also propose an O∗ (9tw W2)-time randomized algorithm to determine whether there exists a minimal s-t separator where W is its weight and tw is the treewidth of G.
CITATION STYLE
Hanaka, T., Bodlaender, H. L., Van Der Zanden, T. C., & Ono, H. (2017). On the maximum weight minimal separator. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 10185 LNCS, pp. 304–318). Springer Verlag. https://doi.org/10.1007/978-3-319-55911-7_22
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