Hyponormal operators and Dunford's condition (B)
type: Item
instance of: scholarly article
title: Hyponormal operators and Dunford's condition (B)
zbMATH Open document ID: 0555.47018
DOI: 10.1007/BF01455867
published in: Mathematische Annalen
publication date: 1985-01-01T00:00:00Z
full work available at URL: https://eudml.org/doc/164032
review text: It is shown that every cohyponormal operator satisfying a Dunford's condition (B) is necessarily normal; the existence of an invariant subspace for such operators was proved by J. G. Stampfli. On the other hand, it is shown that, in spite of the fact that every subnormal or subspectral operator inherently satisfies condition (B), a hyponormal operator may fail to satisfy that condition.
Mathematics Subject Classification ID: 47B20
Mathematics Subject Classification ID: 47B40
zbMATH DE Number: 3884811
zbMATH Keywords: cohyponormal operator
zbMATH Keywords: Dunford's condition (B)
zbMATH Keywords: subspectral operator
zbMATH Keywords: hyponormal operator
author: Mehdi Radjabalipour
MaRDI profile type: Publication
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description: scientific article; zbMATH DE number 3884811