On a conjecture of Hübner

DOI10.1007/BF02837995zbMath0940.47003WikidataQ122926317 ScholiaQ122926317MaRDI QIDQ1961742

F. O. Farid

Publication date: 24 July 2000

Published in: Proceedings of the Indian Academy of Sciences. Mathematical Sciences (Search for Journal in Brave)

zbMATH Keywords

essential spectrumboundary of the numerical range

Mathematics Subject Classification ID

Numerical range, numerical radius (47A12)

Related Items (2)

On non-round points of the boundary of the numerical range and an application to non-selfadjoint Schrödinger operators ⋮ Signatures of quantum phase transitions from the boundary of the numerical range

Cites Work

• On the numerical range of a bounded operator
• Spectrum where the boundary of the numerical range is not round
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