Departamento de Análisis Matemático, Facultad de Matemáticas, Universidad de Sevilla, Apdo. 1160, Sevilla 41080, Spain
Abstract:
We provide in this paper a direct and constructive proof of the following fact: for a Banach space there are bounded linear operators having hypercyclic vectors if and only if is separable and dim. This is a special case of a recent result, which in turn solves a problem proposed by S. Rolewicz.