Mathematics – Functional Analysis
Scientific paper
2009-10-28
Mathematics
Functional Analysis
32 pages
Scientific paper
We construct an analytic self-map $\phi$ of the unit disk and an Orlicz function $\Psi$ for which the composition operator of symbol $\phi$ is compact on the Hardy-Orlicz space $H^\Psi$, but not compact on the Bergman-Orlicz space ${\mathfrak B}^\Psi$. For that, we first prove a Carleson embedding theorem, and then characterize the compactness of composition operators on Bergman-Orlicz spaces, in terms of Carleson function (of order 2). We show that this Carleson function is equivalent to the Nevanlinna counting function of order 2.
Lefèvre Pascal
Li Daniel
Queffélec Hervé
Rodriguez-Piazza Luis
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