WG4 Research Seminar - Talk by Olaf Post

On January 26th, 2022, Olaf Post (University of Trier) will give a talk at 2:30pm CET about

"Some recent results on graph pertubations and the effect on their spectrum".

The talk will be held online in Zoom as part of the research seminar Analysis of the FernUniversität in Hagen. The zoom URL will be sent to all members of the WG4 and to all further colleagues who send a mail to Delio Mugnolo.

Abstract

In this talk I will talk about joint works with Fernandó Lledo (Madrid) and John Fabila (Edinburgh) on the spectrum of discrete Laplacians on weighted magnetic graphs and its behaviour under perturbations such as removing edges, contracting vertices etc. One application is an easy spectral criterion whether a graph is Hamiltonian or not. Another application is a construction of families of isospectral graphs.