A note on classes of structured matrices with elliptical type numerical range

We identify new classes of structured matrices whose numerical range is of the elliptical type, that is, an elliptical disk or the convex hull of elliptical disks.

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Veröffentlicht in:	Czechoslovak Mathematical Journal 2021, Vol.71 (4), p.1015-1023
Hauptverfasser:	Bebiano, Natália, Furtado, Susana
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Convex and Discrete Geometry Convexity Disks Mathematical Modeling and Industrial Mathematics Mathematics Mathematics and Statistics Ordinary Differential Equations Structured matrices
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Beschreibung
Zusammenfassung:	We identify new classes of structured matrices whose numerical range is of the elliptical type, that is, an elliptical disk or the convex hull of elliptical disks.
ISSN:	0011-4642 1572-9141
DOI:	10.21136/CMJ.2021.0174-20