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math.NA2020
Global properties of eigenvalues of parametric rank one perturbations for unstructured and structured matrices
A. C. M. Ran, Michal Wojtylak
General properties of eigenvalues of as functions of $τ\in\Comp$ or $τ\in\Real$ or $τ=\e^{\iiθ}$ on the unit circle are considered. In particular, the problem of existenc…
math.NA2020
Distance problems for dissipative Hamiltonian systems and related matrix polynomials
Christian Mehl, Volker Mehrmann, Michal Wojtylak
We study the characterization of several distance problems for linear differential-algebraic systems with dissipative Hamiltonian structure. Since all models are only approximation…