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New estimations for zeros of polynomials using numerical radius and similarity of matrices. (English) Zbl 1535.26010

Zeidan, Dia (ed.) et al., Mathematics and computation. IACMC 2022. Selected papers based on the presentations at the 7th international Arab conference on mathematics and computations, Zarqa, Jordan, May 11–13, 2022. Singapore: Springer. Springer Proc. Math. Stat. 418, 461-474 (2023).
MSC:  26C10 15A60
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Hilbert-Schmidt numerical radius inequalities for certain \(2 \times 2\) operator matrices. (English) Zbl 07820179

Zeidan, Dia (ed.) et al., Mathematics and computation. IACMC 2022. Selected papers based on the presentations at the 7th international Arab conference on mathematics and computations, Zarqa, Jordan, May 11–13, 2022. Singapore: Springer. Springer Proc. Math. Stat. 418, 93-106 (2023).
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