A conjecture of Biggs concerning the resistance of a distance-regular graph.
Markowsky, Greg, Koolen, Jacobus (2010)
The Electronic Journal of Combinatorics [electronic only]
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Markowsky, Greg, Koolen, Jacobus (2010)
The Electronic Journal of Combinatorics [electronic only]
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Tatjana Aleksić, I. Gutman, M. Petrović (2007)
Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques
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Cvetković, D., Grout, J. (2007)
Bulletin. Classe des Sciences Mathématiques et Naturelles. Sciences Mathématiques
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Lazić, Mirjana (2005)
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Szalay, I. (2001)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
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Dwight Duffus, Peter, L. Erdös, Jaroslav Nešetřil, Lajos Soukup (2007)
Commentationes Mathematicae Universitatis Carolinae
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Let and , respectively, denote the partially ordered sets of homomorphism classes of finite undirected and directed graphs, respectively, both ordered by the homomorphism relation. Order theoretic properties of both have been studied extensively, and have interesting connections to familiar graph properties and parameters. In particular, the notion of a duality is closely related to the idea of splitting a maximal antichain. We construct both splitting and non-splitting infinite maximal...
Kishori P. Narayankar, S. B. Lokesh, Veena Mathad, Ivan Gutman (2012)
Kragujevac Journal of Mathematics
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Ivan Gutman, Elías Gudiño, Domingo Quiroz (2009)
Kragujevac Journal of Mathematics
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