This research reveals refined numerical radius inequalities for sums and products of operators in Hilbert spaces, indicating further generalizations.
Several recent papers gave numerical radius inequalities for sums and products of operators which are defined on a complex separable Hilbert space H. In this paper, we prove a numerical radius inequality which generalizes and refines a recent inequality proved by Kittaneh.
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Al-Labadi et al. (2025) studied this question.
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