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Generalized D-symmetric Operators II

Published online by Cambridge University Press:  20 November 2018

S. Bouali  and
M. Ech-chad
S. Bouali
Affiliation:
Department of Mathematics and Informatics, Faculty of Sciences Kénitra, B. P. 133 Kénitra, Morocco e-mail: said.bouali@yahoo.fr
M. Ech-chad
Affiliation:
Lycée mixte de Missour, 33250 Missour, Morocco e-mail: m.echchad@yahoo.fr
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Abstract

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Let $H$ be a separable, infinite-dimensional, complex Hilbert space and let $A,\,B\,\in \,\mathcal{L}\left( H \right)$ , where $\mathcal{L}(H)$ is the algebra of all bounded linear operators on $H$ . Let ${{\delta }_{AB}}\,:\mathcal{L}\left( H \right)\to \mathcal{L}\left( H \right)$ denote the generalized derivation ${{\delta }_{AB}}\left( X \right)\,=\,AX\,-\,XB$ . This note will initiate a study on the class of pairs $\left( A,\,B \right)$ such that $\overline{R\left( {{\delta }_{AB}} \right)}\,=\,\overline{R\left( {{\delta }_{A*\,B*}} \right)}$ .

Keywords

47B4747B1047A30generalized derivation, adjointD-symmetric operatornormal operator

Information

Type
Research Article
Information
Canadian Mathematical Bulletin , Volume 54 , Issue 1 , 01 March 2011 , pp. 21 - 27
Copyright
Copyright © Canadian Mathematical Society 2011

References

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