On the characterizations of some distinguished subclasses of Hilbert space operators (original) (raw)

Acta Scientiarum Mathematicarum, 2018

Ameur SeddikAmeur Seddik

Abstract

In this note, we present several characterizations for some distinguished classes of bounded Hilbert space operators (self-adjoint operators, normal operators, unitary operators, and isometry operators) in terms of operator inequalities.

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