Numerical Radius Inequalities for Finite Sums of Operators

Mirmostafaee Alireza Kamel; Rahpeyma Omid Pourbahari; Omidvar Mohsen Erfanian

doi:10.2478/dema-2014-0076

Demonstratio Mathematica (Dec 2014)

Numerical Radius Inequalities for Finite Sums of Operators

Mirmostafaee Alireza Kamel,
Rahpeyma Omid Pourbahari,
Omidvar Mohsen Erfanian

Affiliations

Mirmostafaee Alireza Kamel: CENTER OF EXCELLENCE IN ANALYSIS ON ALGEBRAIC STRUCTURES DEPARTMENT OF PURE MATHEMATICS FERDOWSI UNIVERSITY OF MASHHAD P. O. BOX 1159, MASHHAD 91775, MASHHAD, IRAN
Rahpeyma Omid Pourbahari: CENTER OF EXCELLENCE IN ANALYSIS ON ALGEBRAIC STRUCTURES DEPARTMENT OF PURE MATHEMATICS FERDOWSI UNIVERSITY OF MASHHAD P. O. BOX 1159, MASHHAD 91775, MASHHAD, IRAN
Omidvar Mohsen Erfanian: DEPARTMENT OF MATHEMATICS FACULTY OF SCIENCE, MASHHAD BRANCH ISLAMIC AZAD UNIVERSITY, MASHHAD, IRAN

DOI: https://doi.org/10.2478/dema-2014-0076
Journal volume & issue: Vol. 47, no. 4
pp. 963 – 970

Abstract

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In this paper, we obtain some sharp inequalities for numerical radius of finite sums of operators. Moreover, we give some applications of our result in estimation of spectral radius. We also compare our results with some known results.

Published in Demonstratio Mathematica

ISSN: 2391-4661 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Science: Mathematics
Website: https://www.degruyter.com/journal/key/dema/html

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