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This article is cited in 3 scientific papers (total in 3 papers)
Mathematical logic, algebra and number theory
On automorphisms of a distance-regular graph with intersection array $\{243,220,1;1,22,243\}$
V. V. Bitkinaa, A. K. Gutnovaa, A. A. Makhnevb a Severo-Osetinskii State University, str. Vatutina, 46, 362000, Vladikavkaz, Russia
b N.N. Krasovsky Institute of Mathematics and Meckhanics, str. S. Kovalevskoy, 16, 620990, Ekaterinburg, Russia
Abstract:
It was proved that a distance-regular graph in which neighborhoods of vertices are strongly regular with parameters $(245,64,18,16)$ has intersection array $\{243,220,1;1,22,243\}$ or $\{243,220,1;1,4,243\}$. In this paper we found the automorphisms of a distance regular graph with intersection array $\{243,220,1;1,22,243\}$. It is proved that a vertex-transitive distance-regular graph with intersection array $\{243,220,1;1,22,243\}$ is the arc-transitive Mathon graph affording the group $L_2(3^5)$.
Keywords:
distance-regular graph, automorphism.
Received November 9, 2016, published November 24, 2016
Citation:
V. V. Bitkina, A. K. Gutnova, A. A. Makhnev, “On automorphisms of a distance-regular graph with intersection array $\{243,220,1;1,22,243\}$”, Sib. Èlektron. Mat. Izv., 13 (2016), 1040–1051
Linking options:
https://www.mathnet.ru/eng/semr733 https://www.mathnet.ru/eng/semr/v13/p1040
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