International Series of Numerical Mathematics, 2009, Volume 157, Part III, 135-146, DOI: 10.1007/978-3-7643-8773-0_13

Inequalities for the Norm and Numerical Radius of Composite Operators in Hilbert Spaces

Silvestru S. Dragomir

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Abstract

Some new inequalities for the norm and the numerical radius of composite operators generated by a pair of operators are given.

Keywords  Numerical range - numerical radius - bounded linear operators - Hilbert spaces

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