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http://hdl.handle.net/10071/12125
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Title: Operators with a given part of the numerical range
Authors: Bracic, J.
Diogo, C.
Keywords: Numerical range
Hildebrandt’s theorem
Issue Date: 2016
Publisher: De Gruyter
Abstract: Sets of operators which have a given set of numbers in the numerical range are studied. We prove an interesting result which characterizes the set of operators that have 0 in the convex hull of its spectrum. Along the way we give a simpler proof of the well known Hildebrandt’s theorem.
Peer reviewed: yes
URI: http://hdl.handle.net/10071/12125
DOI: 10.1515/ms-2015-0134
ISSN: 0139-9918
Ciência-IUL: https://ciencia.iscte-iul.pt/id/ci-pub-22849
Accession number: WOS:000375745500025
Appears in Collections:DM-RI - Artigos em revistas científicas internacionais

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