Raffinement de la borne spectrale d'un faisceau de matrices
Real and complex pseudozero sets for polynomials with applications
Pseudozeros are useful to describe how perturbations of polynomial coefficients affect its zeros. We compare two types of pseudozero sets: the complex and the real pseudozero sets. These sets differ with respect to the type of perturbations. The first set – complex perturbations of a complex polynomial – has been intensively studied while the second one – real perturbations of a real polynomial – seems to have received little attention. We present a computable formula for the real pseudozero...
Relations Between Condition Numbers and the Convergence of the Jacobi Method for Real Positive Definite Matrices.
Remarques sur les algorithmes de décomposition de domaines