On the Hankel-norm approximation of upper-triangular operators and matrices

DOI10.1007/BF01322544zbMath0799.47006OpenAlexW2005198822MaRDI QIDQ1316443

Patrick Dewilde, Alle-Jan van der Veen

Publication date: 17 November 1994

Published in: Integral Equations and Operator Theory (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf01322544

zbMATH Keywords

model reductionapproximation theoryHankel normfractional representationcolligationmaximum entropy approximantnon-stationary \(J\)-unitary operatornon-Toeplitz upper operatorsSchur-Takagi interpolationstationary linear dynamical systemsstrictly stable non-stationary but linear dynamical state space model

Mathematics Subject Classification ID

(H^infty)-control (93B36) Linear operator methods in interpolation, moment and extension problems (47A57) Linear operator approximation theory (47A58) Applications of operator theory in systems, signals, circuits, and control theory (47N70)

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