On the numerical radius of an upper triangular operator matrix
نویسندگان
چکیده
The main purpose of this paper is to give an improvement numerical radius inequality for upper triangular operator matrix.
منابع مشابه
Numerical Radius Norms on Operator Spaces
Abstract. We introduce a numerical radius operator space (X,Wn). The conditions to be a numerical radius operator space are weaker than the Ruan’s axiom for an operator space (X,On). Let w(·) be the numerical radius norm on B(H). It is shown that if X admits a norm Wn(·) on the matrix space Mn(X) which satisfies the conditions, then there is a complete isometry, in the sense of the norms Wn(·) ...
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ژورنال
عنوان ژورنال: Tamkang Journal of Mathematics
سال: 2023
ISSN: ['0049-2930', '2073-9826']
DOI: https://doi.org/10.5556/j.tkjm.55.2023.5094