Title: Two conjectures on the spread of graphsSpeaker: Michael Tait Affiliation: Villanova University Zoom: Contact Soffia Arnadottir
Given a graph $G$ let $\lambda_1$ and $\lambda_n$ be the maximum and minimum eigenvalues of its adjacency matrix and define the spread of $G$ to be $\lambda_1 - \lambda_n$. In this talk we discuss solutions to a pair of 20 year old conjectures of Gregory, Hershkowitz, and Kirkland regarding the spread of graphs.
Title: In Memoriam: Tom Coleman’s Contributions to Applied Mathematics and OptimizationSpeaker: Yuying Li, Stephen Wright, Alex Pothen, Bruce Hendrickson, Peter Forsyth, and Somayeh Moazeni Affiliation: SIAM Annual Meeting (AN21) Registration: https://www.siam.org/conferences/cm/conference/an21
Title: In Memoriam: Tom Coleman’s Contributions to Applied Mathematics and OptimizationSpeakers:
Yuying Li, Stephen Wright, Alex Pothen, Bruce Hendrickson, Peter Forsyth, and Somayeh MoazeniAffiliation:
SIAM Annual Meeting (AN21)Registration: https://www.siam.org/conferences/cm/conference/an21
Thomas F. Coleman—a leader in optimization and scientific computing, professor at the University of Waterloo, and a SIAM Fellow—passed away on April 20, 2021. Tom served as the Director of the Theory Center at Cornell and then as Dean of the Faculty of Mathematics at the University of Waterloo. His research spanned continuous optimization, combinatorial scientific computing, automatic differentiation, financial optimization, mathematical software, etc. In this session, his wife and collaborator, Yuying Li, and five of his students and colleagues will describe the pioneering contributions that Tom made to these fields in his research.