Essential Spectra of Composition Operators on the Space of Bounded Analytic Functions

In this small note we characterize the essential spectra of a class of composition operators on H\infty(H) of the upper half-plane H and on H\infty(D) of the unit disc D. These composition operators are induced by perturbations of translations

Essential Spectra of Composition Operators on the Space of Bounded Analytic Functions

In this small note we characterize the essential spectra of a class of composition operators on H\infty(H) of the upper half-plane H and on H\infty(D) of the unit disc D. These composition operators are induced by perturbations of translations