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New conditions for counteractivity of normality operators

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Okelo_New conditions for counteractivity of normality operators.pdf (641.2Kb)
Publication Date
2017-08
Author
Okelo, Bernad N.
Mogotu, P.O
Type
Working Paper
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Abstract/Overview

An interesting area in operator theory is the study of norm inequalities for Hilbert space operators. Many mathematicians have worked on this subject, for example in [2, 3 and 5]. On the other hand, contractive and normaloid operators have been considered separately by [1, 6, 7 and 8]. In this paper, we results on conditions for normaloidity and contractivity of Hilbert space operators. We begin by simple lemmas before we move to main results. Let be a complex Hilbert space with an inner product and the algebra of all bounded linear operators on . denotes the usual operator norm and Dom( ) denotes the domain of

Subject/Keywords
Normaloid operators; Contractive operators; Cauchy-Schwarz inequality; Tensor product
ISSN
23205822
Series
Volume 4, No. 9, August 2017;
Permalink
http://62.24.102.115:8080/xmlui/handle/123456789/1219
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