Notes on the numerical radius for adjointable operators on Hilbert $C^{\ast }$-modules

J. Li, K. Wu, Q. Xu

Given a Hilbert module $H$ over a $C^{\ast }$-algebra, let $\mathcal{L}(H)$ be the set of all adjointable operators on $H$. For each $T\in \mathcal{L}(H)$, its numerical radius is defined…