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Trudy Instituta Matematiki i Mekhaniki UrO RAN, 2016, Volume 22, Number 3, Pages 137–143
DOI: https://doi.org/10.21538/0134-4889-2016-22-3-137-143
(Mi timm1328)
 

This article is cited in 3 scientific papers (total in 3 papers)

On graphs in which neighborhoods of vertices are strongly regular with parameters (85,14,3,2) or (325,54,3,10)

M. M. Isakovaa, A. A. Makhnevbc, A. A. Tokbaevaa

a Kabardino-Balkar State University, Nal'chik
b Institute of Mathematics and Mechanics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
c Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
Full-text PDF (163 kB) Citations (3)
References:
Abstract: J. Koolen posed the problem of studying distance regular graphs in which neighborhoods of vertices are strongly regular graphs with nonprincipal eigenvalue at most $t$ for a given positive integer$t$. This problem was solved earlier for $t=3$. In the case $t=4$, a reduction to graphs in which neighborhoods of vertices have parameters (352,26,0,2), (352,36,0,4), (243,22,1,2), (729,112,1,20), (204,28,2,4), (232,33,2,5), (676,108,2,20), (85,14,3,2), or (325,54,3,10) was obtained. In the present paper, we prove that a distance regular graph in which neighborhoods of vertices are strongly regular with parameters $(85,14,3,2)$ or $(325,54,3,10)$ has intersection array $\{85,70,1;1,14,85\}$ or $\{325,270,1;1,54,325\}$. In addition, we find possible automorphisms of a graph with intersection array $\{85,70,1;1,14,85\}$.
Keywords: strongly regular graph, locally $\mathcal X$-graph, automorphism of a graph.
Funding agency Grant number
Russian Science Foundation 14-11-00061
Ministry of Education and Science of the Russian Federation 02.A03.21.0006
Received: 17.10.2015
English version:
Proceedings of the Steklov Institute of Mathematics (Supplementary issues), 2017, Volume 299, Issue 1, Pages 68–74
DOI: https://doi.org/10.1134/S0081543817090097
Bibliographic databases:
Document Type: Article
UDC: 519.17
MSC: 05C25, 20F29
Language: Russian
Citation: M. M. Isakova, A. A. Makhnev, A. A. Tokbaeva, “On graphs in which neighborhoods of vertices are strongly regular with parameters (85,14,3,2) or (325,54,3,10)”, Trudy Inst. Mat. i Mekh. UrO RAN, 22, no. 3, 2016, 137–143; Proc. Steklov Inst. Math. (Suppl.), 299, suppl. 1 (2017), 68–74
Citation in format AMSBIB
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\paper On graphs in which neighborhoods of vertices are strongly regular with parameters (85,14,3,2) or (325,54,3,10)
\serial Trudy Inst. Mat. i Mekh. UrO RAN
\yr 2016
\vol 22
\issue 3
\pages 137--143
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\yr 2017
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  • This publication is cited in the following 3 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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    Trudy Instituta Matematiki i Mekhaniki UrO RAN
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