Essential spectra of composition operators on the space of bounded analytic functions
Uğur, Gül (2008) Essential spectra of composition operators on the space of bounded analytic functions. Turkish Journal of Mathematics, 32 (4). pp. 475-480. ISSN 1300-0098
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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.
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