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Perturbation theory for Hamiltonian matrices and the distance to bounded-realness. (English) Zbl 1227.93081

##### MSC:
 93C73 Perturbations in control/observation systems 93B36 $$H^\infty$$-control 93B40 Computational methods in systems theory (MSC2010) 49N35 Optimal feedback synthesis 65F15 Numerical computation of eigenvalues and eigenvectors of matrices 93B52 Feedback control 93C05 Linear systems in control theory
##### Software:
Eigtool; Seigtool
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