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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