学 术 报 告
报告题目:Some spectral extremal results for hypergraphs
报告人:常安 教授(福州大学)
报告时间:周日(10月13号)下午3点—4点
报告地点:yl23455永利307报告厅
数学与统计学院
2019.9.27
报告摘要: Let F be a graph. A hypergraph is called Berge F if it can be obtained by replacing each edge in F by a hyperedge containing it. Given a family of graphs , we say that a hypergraph H is Berge -free if for every F \in H does not contain a Berge F as a subhypergraph. In this talk, we investigate the connections between spectral radius of the adjacency tensor and structural properties of a hypergraph. In particular, a spectral version of Turán-type result on linear k-uniform hypergraphs is obtained by using spectral methods, including a tight result on Berge C4-free linear 3-uniform hypergraphs.
报告人简介:常安, 福州大学教授,博士生导师。现任中国数学会组合数学与图论专业委员会副主任、福建省运筹学会理事长。主要从事图论领域中图的谱理论及应用研究。已在国内外专业期刊发表研究论文 60 多篇,承担或参与了包括国家重点研究计划(973 计划)项目课题、国家自然科学基金重点项目在内的十余项国家级科研项目的研究工作。2004年获福建省科学技术二等奖。