On the numerical range of some block matrices with scalar diagonal blocks

Titas Geryba, Ilya M. Spitkovsky

Research output: Contribution to journalArticle

Abstract

Several new verifiable conditions are established for matrices of the form (Formula presented.) to have the numerical range equal the convex hull of at most k ellipses. For k = 2, these conditions are also necessary, provided that the ellipses are co-centred.

Original languageEnglish (US)
JournalLinear and Multilinear Algebra
DOIs
StateAccepted/In press - 2020

Keywords

  • Numerical range

ASJC Scopus subject areas

  • Algebra and Number Theory

Fingerprint Dive into the research topics of 'On the numerical range of some block matrices with scalar diagonal blocks'. Together they form a unique fingerprint.

  • Cite this