题  目：On Hoffman graphs

报告人：Hyonju Yu 博士 （Pusan National University 韩国釜山大学）

时   间：2014年2月25日    下午4:00－5:00

地   点：东区管理科研楼  365英国上市官网1316室

摘   要：
Abstract:  In 1976, Cameron et al showed that except for a few exception all graphs with smallest eigenvalue at least -2 are generalized line grapgs. In 1977, Hoffman showed that the next limit point equals -1-sqrt2. In recent years the work of Hoffman has been extended by Woo and Neumaier(1995) and Taniguchi(2009) using the concept of Hoffman graph. In this talk, we will discuss the limit points using the Hoffman graphs under some conditions.

主办单位： 365英国上市官网 
         中科院吴文俊数学重点实验室
 
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