Title
Symmetric graphs of valency five and their basic normal quotients
Abstract
A graph Γ is symmetric or arc-transitive if its automorphism group Aut(Γ) is transitive on the arc set of the graph, and Γ is basic if Aut(Γ) has no non-trivial normal subgroup N such that the quotient graph ΓN has the same valency as Γ. In this paper, we classify symmetric basic graphs of order 2qpn and valency 5, where q<p are two primes and n is a positive integer. It is shown that such a graph is isomorphic to a family of Cayley graphs on dihedral groups of order 2q with 5|(q−1), the complete graph K6 of order 6, the complete bipartite graph K5,5 of order 10, or one of the nine sporadic coset graphs associated with non-abelian simple groups. As an application, connected pentavalent symmetric graphs of order kpn for some small integers k and n are classified.
Year
DOI
Venue
2019
10.1016/j.ejc.2018.02.020
European Journal of Combinatorics
Field
DocType
Volume
Discrete mathematics,Complete bipartite graph,Complete graph,Combinatorics,Dihedral group,Cayley graph,Isomorphism,Normal subgroup,Quotient graph,Mathematics,Simple group
Journal
80
ISSN
Citations 
PageRank 
0195-6698
0
0.34
References 
Authors
9
4
Name
Order
Citations
PageRank
Dawei Yang162.79
Yan-quan Feng235041.80
JinHo Kwak322.06
Jaeun Lee411022.10