PENTAVALENT SYMMETRIC GRAPHS OF ORDER 30p

被引:17
作者
Ling, Bo [1 ]
Wu, Ci Xuan [1 ]
Lou, Ben Gong [1 ]
机构
[1] Yunnan Univ, Sch Math & Stat, Kunming 650031, Peoples R China
关键词
arc-transitive graph; pentavalent symmetric graph; automorphism group;
D O I
10.1017/S0004972714000616
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A complete classification is given of pentavalent symmetric graphs of order 30p, where p >= 5 is a prime. It is proved that such a graph Gamma exists if and only if p = 13 and, up to isomorphism, there is only one such graph. Furthermore, Gamma is isomorphic to C-390, a coset graph of PSL(2, 25) with Aut Gamma = PSL( 2, 25), and Gamma is 2-regular. The classification involves a new 2-regular pentavalent graph construction with square-free order.
引用
收藏
页码:353 / 362
页数:10
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