λ=1的强正则图的必要条件  

Necessary Conditions for Strongly Regular Graphs with λ=1

作　　者：郭巧萍[1] 李胜家[1] 

机构地区：[1]山西大学数学科学学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2009年第3期337-340,共4页Journal of Shanxi University(Natural Science Edition)

基　　金：山西省自然科学基金(2007011002)

摘　　要：研究了参数为(v,k,λ,μ)且λ=1的强正则图的必要条件.说明了当λ=1时,k必为偶数,进而得到k和μ应满足的一些关系式.Some necessary conditions for strongly regular graphs with parameters（v,k,λ,μ） and λ = 1 were studied. It was shown that k was even when λ= 1. Furthermore, some formulae that k and μ satisfy were obtained.

关 键 词：强正则图 特征值 部分四边形 

分 类 号：O157.5[理学—数学]