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Speaker:Zeng Qiang, Assistant Professor, Faculty of Mathematics, University of Macau
Date: June. 1, 2022
Time: 19:30-20:30
Location: Tecent Meeting, ID:752 465 434
Sponsor: School of Mathmatics, Shandong University
Abstract:
A signed graph is a graph whose edges are labelled by a signature. It serves as a simple model of discrete vector bundle. The fundamental ideas of balance and switching of signed graphs often lead to more systematic understanding of various parts of graph theory. In this talk, I will explain two such cases: a unification of Cheeger inequality and Bauer-Jost dual Cheeger inequality, and a unification of the discrete nodal domain theorem due to Davis, Galdwell, Leydold and Stadler, and Fiedler's approach on eigenvectors of acyclic matrices. This talk is based on joint works with Fatihcan Atay and with Chuanyuan Ge.
For more information, please visit:
https://view.sdu.edu.cn/info/1020/166262.htm