Computing the P 3 -hull number of a graph, a polyhedral approach
A subset S of vertices of a graph G=(V,E) is P 3 -convex if every simple path of three vertices starting and ending in S is contained in S. The P 3 -convex hull of S is the smallest P 3 -convex set containing S and the P 3 -hull number of G is the minimum number of vertices of a subset S such that i...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0166218X_v255_n_p155_Blaum |
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| Sumario: | A subset S of vertices of a graph G=(V,E) is P 3 -convex if every simple path of three vertices starting and ending in S is contained in S. The P 3 -convex hull of S is the smallest P 3 -convex set containing S and the P 3 -hull number of G is the minimum number of vertices of a subset S such that its convex hull is V. It is a known fact that the calculation of the P 3 -hull number of a graph is NP-hard. In the present work we start the study of this problem from a polyhedral point of view, that is, we pose it as a binary IP problem and we study the associated polytope by exploring several families of facet-defining inequalities. © 2018 Elsevier B.V. |
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