The Bishop-Phelps-Bollobás property for numerical radius in ${\ell }_1(\mathbb{C})$

Antonio J. Guirao, Olena Kozhushkina

We show that the set of bounded linear operators from $X$ to $X$ admits a Bishop-Phelps-Bollobás type theorem for numerical radius whenever $X$ is ${\ell }_1(\mathbb{C})$ or $c_0(\mat…