Abstract
The neighborhood graph \(G'\) of a graph G has the same vertex set as G and two vertices are adjacent in \(G'\) if and only if they have a common neighbor in G. We study the diameter \(\mathrm{diam}(G')\) of the neighborhood graph \(G'\) in terms of the diameter of G. We show that if G is a connected non-bipartite graph of diameter d, then \(\lceil d/2 \rceil \le \mathrm{diam}(G') \le d\) and the bounds are best possible for every \(d \ge 1\). If G is a connected bipartite graph, then \(G'\) has 2 components. We also present results on the diameter of components of \(G'\), if \(G'\) is the neighborhood graph of a connected bipartite graph.
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Ayyaswamy, S.K., Balachandran, S., Kannan, K.: Bounds on the second stage spectral radius of graphs. Int. J. Comput. Math. Sci. 3, 424–427 (2009)
Alwardi, A., Arsić, B., Gutman, I., Soner, N.D.: The common neighborhood graph and its energy. Iran. J. Math. Sci. Inf. 7, 1–8 (2012)
Alwardi, A., Soner, N.D., Gutman, I.: On the common-neighborhood energy of a graph. Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences Mathématiques 36, 49–59 (2011)
Boland, J.W., Brigham, R.C., Dutton, R.D.: Embedding arbitrary graphs in neighborhood graphs. J. Comb. Syst. Sci. 12, 101–112 (1987)
Boland, J.W., Brigham, R.C., Dutton, R.D.: The difference between a neighborhood graph and a wheel. Congressus Numer. 58, 151–156 (1987)
Cozzens, M.: Food webs, competition graphs, and habitat formation. Math. Model. Nat. Phenom. 6, 22–38 (2011)
Brigham, R.C., Dutton, R.D.: On neighbourhood graphs. J. Comb. Syst. Sci. 12, 75–84 (1987)
Jog, S.R., Hande, S.P., Gutman, I., Bozkurt, S.B.: Derived graphs of some graphs. Kragujev. J. Math. 36, 309–314 (2012)
Schiermeyer, I., Sonntag, M., Teichert, H.-M.: Structural properties and Hamiltonicity of neighborhood graphs. Gr. Comb. 26, 433–456 (2010)
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The work was supported by the National Research Foundation of South Africa; Grant numbers: 91499, 90793.
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Communicated by Xueliang Li.
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Vetrík, T. Diameter of Neighborhood Graphs. Bull. Malays. Math. Sci. Soc. 39 (Suppl 1), 117–122 (2016). https://doi.org/10.1007/s40840-015-0231-0
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DOI: https://doi.org/10.1007/s40840-015-0231-0