Karow, Michael2017-12-142017-12-142011-09-060895-4798https://depositonce.tu-berlin.de/handle/11303/7275http://dx.doi.org/10.14279/depositonce-6548We study the variation of the spectrum of matrices under perturbations which are self- or skew-adjoint with respect to a scalar product. Computable formulas are given for the associated μ-values. The results can be used to calculate spectral value sets for the perturbation classes under consideration. We discuss the special case of complex Hamiltonian perturbations of a Hamiltonian matrix in detail.en512 Algebra519 Wahrscheinlichkeiten, angewandte Mathematiklinear systemseigenvaluesperturbationsspectral value setsμ-valuesμ-values and spectral value sets for linear perturbation classes defined by a scalar productArticle1095-7162