Orateur(s)  Daniel Plaumann  University of Dortmund, Germany,

Titre  Hyperbolic polynomials and interlacers 
Date  06/06/2017 
Horaire  14:15 à 16:00 

Résume  A real polynomial in one variable is realrooted if and only if it is the characteristic polynomial of a real symmetric matrix. Hyperbolic polynomials are the multivariate generalizations of realrooted polynomials and their relation to matrices is far more intricate. A key role is played by interlacing polynomials, whose zeros are nested in between those of a given hyperbolic polynomial. This talk will survey some known results as well as work in progress. 
Salle  1016 
Adresse  Sophie Germain 