|Zilin Jiang from MIT ||Zilin Jiang from MIT ||EWG 336||Title:Equiangular lines with a fixed angle
Abstract: A set of lines through the origin in a Euclidean space is called equiangular if they are pairwise separated by the same angle. It is known that the maximum size of an equiangular set of lines grows quadratically as the dimension of the Euclidean space grows. However, when the angle is held fixed, a very different yet intricate behavior of the maximum size emerges. In this talk, I will explain how the determination of this behavior connects to some central notions in spectral graph theory, namely, the maximum eigenvalue of a graph and the multiplicity of the second largest eigenvalue.
Joint work with Alexandr Polyanskii, Jonathan Tidor, Yuan Yao, Shengtong Zhang and Yufei Zhao.
||3/26/2020 6:00:00 PM||3/26/2020 7:00:00 PM||False|
| Xiaoye Liang from Anhui University, China and WPI|| Xiaoye Liang from Anhui University, China and WPI||EWG 336||Title:Terwilliger algebra of the Johnson scheme
Abstract: <a href="https://www.mathsci.udel.edu/content-sub-site/Documents/abstract.pdf">To view the abstract click here</a>||3/19/2020 6:00:00 PM||3/19/2020 7:00:00 PM||False|
|Melissa Fuentes from University of Delaware||Melissa Fuentes from University of Delaware||EWG 336||Title:The Maximum Number of q-Colorings of Graphs With Fixed Numbers of
Vertices and Edges
Abstract: <a href="https://www.mathsci.udel.edu/content-sub-site/Documents/Abstract%20-%20Melissa%20Fuentes%20-%20Discrete%20Seminar%20March%2012%2c%202020.pdf">Click here to view the abstract</a>
||3/12/2020 6:00:00 PM||3/12/2020 7:00:00 PM||False|
|Apoorva Khare||Apoorva Khare||EWG 336||Title:Distance matrices of trees: invariants, old and new
Abstract: : <a href="https://www.mathsci.udel.edu/content-sub-site/Documents/ApoorvaKhareWinter2020.pdf"> View Abstract</a>
||2/7/2020 2:00:00 PM||2/7/2020 3:00:00 PM||False|
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