Geodesic
Numerical radius inequalities for $2\times 2$ operator matrices
Omar Hirzallah 1   ; Fuad Kittaneh 2   ; Khalid Shebrawi 3
1 Department of Mathematics Hashemite University Zarqa, Jordan
2 Department of Mathematics University of Jordan Amman, Jordan
3 Department of Applied Sciences Al-Balqa' Applied University Salt, Jordan
Studia Mathematica, Tome 210 (2012) no. 2, pp. 99-115 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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We derive several numerical radius inequalities for $2\times 2 $ operator matrices. Numerical radius inequalities for sums and products of operators are given. Applications of our inequalities are also provided.
DOI : 10.4064/sm210-2-1
Keywords: derive several numerical radius inequalities times operator matrices numerical radius inequalities sums products operators given applications inequalities provided

Omar Hirzallah  1   ; Fuad Kittaneh  2   ; Khalid Shebrawi  3

1 Department of Mathematics Hashemite University Zarqa, Jordan
2 Department of Mathematics University of Jordan Amman, Jordan
3 Department of Applied Sciences Al-Balqa' Applied University Salt, Jordan 
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Omar Hirzallah; Fuad Kittaneh; Khalid Shebrawi. Numerical radius inequalities for $2\times  2$ operator matrices. Studia Mathematica, Tome 210 (2012) no. 2, pp. 99-115. doi: 10.4064/sm210-2-1

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