Security number of grid-like graphs |
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Authors: | Kyohei Kozawa Koichi Yamazaki |
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Institution: | Department of Computer Science, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan |
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Abstract: | The security number of a graph is the cardinality of a smallest vertex subset of the graph such that any attack on the subset is defendable. In this paper, we determine the security number of two-dimensional cylinders and tori. This result settles a conjecture of Brigham et al. R.C. Brigham, R.D. Dutton, S.T. Hedetniemi, Security in graphs, Discrete Appl. Math. 155 (2007) 1708-1714]. |
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Keywords: | Security number Grid Cylinder Torus |
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