... diagonal¹

The research was partially supported by the Research Council K.U.Leuven, project OT/00/16 (SLAP: Structured Linear Algebra Package), by the Fund for Scientific Research-Flanders (Belgium), projects G.0078.01 (SMA: Structured Matrices and their Applications), G.0176.02 (ANCILA: Asymptotic aNalysis of the Convergence behavior of Iterative methods in numerical Linear Algebra), G.0184.02 (CORFU: Constructive study of Orthogonal Functions) and G.0455.0 (RHPH: Riemann-Hilbert problems, random matrices and Padé-Hermite approximation), and by the Belgian Programme on Interuniversity Poles of Attraction, initiated by the Belgian State, Prime Minister's Office for Science, Technology and Culture, project IUAP V-22 (Dynamical Systems and Control: Computation, Identification & Modelling). The scientific responsibility rests with the authors.

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... Vandebril²

Email:raf.vandebril-at-cs.kuleuven.ac.be

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... Camp³

Email:ellen.vancamp-at-cs.kuleuven.ac.be

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... Barel⁴

Email:marc.vanbarel-at-cs.kuleuven.ac.be

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... Mastronardi⁵

Email:nicola.mastronardi-at-cs.kuleuven.ac.be

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... Matlab⁶

Matlab is a registered trademark of the Mathwork Inc.

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