Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4590420 | Journal of Functional Analysis | 2013 | 15 Pages |
Abstract
We provide two function-theoretic estimates for the essential norm of a composition operator Cφ acting on the space BMOA; one in terms of the n-th power φn of the symbol φ and one which involves the Nevanlinna counting function. We also show that if the symbol φ is univalent, then the essential norm of Cφ is comparable to its essential norm on the Bloch space.
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Physical Sciences and Engineering
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