报告题目：Distance-regular Shilla graphs and their automorphisms

报告人：Aleksandr Makhnev 院士(俄罗斯科学院乌拉尔分院数学与力学研究所)

时间：4月23日（周一）下午3：20--4：10

地点：管理科研楼数学学院1518教室

摘要: Distance-regular graph of diameter d has exactly d+1 eigenvalues  \theta_0=k>\theta_1>

...>\theta_d. If distance-regular graph with diameter three contains eigenvalue a_3, then it 

is called Shilla graph. It follows that for a Shilla distance-regular graph \Gamma, the number 

a=a_3 divides k and we will put b=b(\Gamma)=k/a (Koolen-Park, 2010). The theory of Shilla graphs 

with b_2=c_2 is developed. Shilla graphs with b_2=sc_2 are considered.

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