Some revisited results about composition operators on Hardy spaces
Pascal LefèvreUniversité d'Artois, Lens, France
Daniel LiUniversité d'Artois, Lens, France
Hervé QueffélecUniversité Lille I, Villeneuve d'Ascq, France
Luis Rodríguez PiazzaUniversidad de Sevilla, Spain
On the one hand, we generalize some results known for composition operators on Hardy spaces to the case of Hardy–Orlicz spaces : construction of a “slow” Blaschke product giving a non-compact composition operator on and yet “nowhere differentiable”; construction of a surjective symbol whose associated composition operator is compact on~ and is, moreover, in all Schatten classes , . On the other hand, we revisit the classical case of composition operators on , giving first a new, and simpler, characterization of composition operators with closed range, and then showing directly the equivalence of the two characterizations of membership in Schatten classes of Luecking, and Luecking–Zhu.
Cite this article
Pascal Lefèvre, Daniel Li, Hervé Queffélec, Luis Rodríguez Piazza, Some revisited results about composition operators on Hardy spaces. Rev. Mat. Iberoam. 28 (2012), no. 1, pp. 57–76DOI 10.4171/RMI/666