Departure from normality and eigenvalue perturbation bounds
Ilse C. F. Ipsen · NCSU Libraries Repository (North Carolina State University Libraries) · 2003
Abstract. Perturbation bounds for eigenvalues of diagonalizable matrices are derived that do not depend on any quantities associated with the perturbed matrix; in particular the perturbed matrix can be defective. Furthermore, Gerschgorin-like inclusion regions in the Frobenius are derived, as well as bounds on the departure from normality.