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Structural and algorithmic properties of maximal dissociating sets in graphs
O. I. Duginova, B. M. Kuskovaa, D. S. Malyshevb, N. A. Shura a Belarusian State University, Minsk
b National Research University – Higher School of Economics in Nizhny Novgorod
Abstract:
A subset of the vertex set of a graph is called dissociating if the degrees of the vertices of the subgraph generated by this subset do not exceed $1$. A dissociating set is maximal if it is not contained in any dissociating set with a greater number of vertices. Estimates for the greatest (smallest) number of vertices in a maximal dissociating set of a graph are proposed. It is proved that the problem of finding a maximal dissociating set of smallest cardinality is NP-hard for quasichordal bipartite graphs. In addition, it is proved that the problem of finding a maximal dissociating set of smallest cardinality is NP-hard for chordal bipartite graphs, bipartite graphs with the greatest degree of a vertex equal to 3, planar graphs with large girth, and for classes of graphs characterized by finite lists of forbidden generated biconnected subgraphs. A linear algorithm for solving the latter problem in the class of trees is proposed.
Keywords:
maximal dissociating set of a graph, problem of finding a maximal generated subgraph with maximum degree of a vertex at most 1, maximal dissociation set, perfect elimination bipartite graph, NP-completeness, hereditary graph classes, trees.
Received: 22.02.2022 Revised: 04.05.2022 Accepted: 11.05.2022
Citation:
O. I. Duginov, B. M. Kuskova, D. S. Malyshev, N. A. Shur, “Structural and algorithmic properties of maximal dissociating sets in graphs”, Trudy Inst. Mat. i Mekh. UrO RAN, 28, no. 2, 2022, 114–142
Linking options:
https://www.mathnet.ru/eng/timm1909 https://www.mathnet.ru/eng/timm/v28/i2/p114
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