报告题目：Equiangular lines and eigenvalue multiplicities of graphs

报告人：葛川源（福州大学）

时间：2026年7月2日15:00-16:00

地点：5106

报告摘要：A set of lines in R^d passing through the origin is called equiangular if every two lines have a common angle. In this talk, we will first review the connection between the eigenvalue multiplicities of graphs and equiangular lines. We will then present our recent work on eigenvalue multiplicities of graph and its applications to equiangular lines. This is based on jointed works with Shiping Liu.