UW-PIMS Colloquium: Yufei Zhao

  • Date: 10/28/2022
  • Time: 15:30
Yufei Zhao, MIT

University of Washington


Equiangular lines and eigenvalue multiplicities


Solving a longstanding problem on equiangular lines, we determine, for each given fixed angle and in all sufficiently large dimensions, the maximum number of lines pairwise separated by the given angle.


A key ingredient is a new result in spectral graph theory: the adjacency matrix of a connected bounded degree graph has sublinear second eigenvalue multiplicity.


My talk will discuss these problems and their connections.

Other Information: 

Time: 3.30pm - 4.30pm Pacific

Location: University of Washington, ECE 125 


More event details can be found here.