Perturbed spectra of defective matrices

  title={Perturbed spectra of defective matrices},
  author={Mihail Konstantinov and Volker Mehrmann and Petko Hr. Petkov},
  journal={Journal of Applied Mathematics},
This paper is devoted to the perturbation theory for defective matrices. We consider the asymptotic expansions of the perturbed spectrum when a matrix A is changed to A 

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