Resumen de Reflexive Spaces and Numerical Radius Attaining Operators

Manuel Ruiz Galán , María Dolores Acosta Vigil

• In this note we deal with a version of James' Theorem for numerical radius, which was already considered in [4]. First of all, let us recall that this well known classical result states that a Banach space satisfying that all the (bounded and linear) functionals attain the norm, has to be reflexive [16].