2013/09/10 by Roman Drnovšek, Vladimir Müller · 1 citation
Computer Science · Mathematics · #Matrix Theory and Algorithms #Algebraic and Geometric Analysis #Holomorphic and Operator Theory
paper · doi:10.1080/03081087.2013.816303
Let be operators on a Hilbert space . We continue the study of the question whether it is possible to find a unit vector such that is large for all . Thus we are looking for a generalization of the well-known inequality for the numerical radius of a single operator .