The distance to intertwining operators, contractive liftings and a related optimality result

DOI10.1007/S00020-003-1154-YzbMath1060.47022OpenAlexW2397009367MaRDI QIDQ1417437

Marinus A. Kaashoek, Ciprian Foias, Arthur E. Frazho

Publication date: 5 January 2004

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

Full work available at URL: https://doi.org/10.1007/s00020-003-1154-y

zbMATH Keywords

contractive liftingdistance to intertwining operatorsoperator lines

Mathematics Subject Classification ID

Numerical range, numerical radius (47A12) Linear operator methods in interpolation, moment and extension problems (47A57) Dilations, extensions, compressions of linear operators (47A20) Linear operator approximation theory (47A58)

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