Discrete Math Seminar Spring 2009

Threshold graphs and the Grone-Merris conjecture

Jamie Radcliffe, UNL; Jan 20
The Grone-Merris conjecture is a conjectural inequality relating the eigenvalues of (the Laplacian) of a graph and its degree sequence. It is known to hold with equality for an interesting class of graphs called threshold graphs. I will introduce the graphs, the ineqaulity, and some of the known results.