Speaker：Prof. Hou Yaoping

          Hunan Normal University

Title:  On the spectrum and Zeta function of a graph

Time：21^st, Nov., 2020, 16:30

Location：数理大楼6楼天元会议室 (线下) 

Abstract:

In this talk, we present the Ihara zeta function of the cone over a semiregular bipartite graph and show that are cospectral if and only if they have the same Ihara zeta function. We also present the decomposition formulae for the zeta functions of families of graphs obtained through corona-type construction and construct some families of graphs with the same zeta function by the spectra of these graphs. We present relations between the invariants of a graph can be obtained from the partial derivatives at some point of a determinant in terms of its Bartholdi zeta function. 

Speaker Introduction：

湖南师范大学教授，长期从事代数学和组合数学的教学与研究，主要研究领域为代数图论及其应用，已在国内外学术期刊上发表论文100多篇。已主持国家自然科学基金和湖南省自然科学基金项目多项。完成的科研成果2003年和2010年分别获得安徽省科技进步二等奖和湖南省人民政府自然科学奖二等奖。

联系人：金贤安