Sammanfattning
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.
Originalspråk | Engelska |
---|---|
Sidor (från-till) | 629-643 |
Antal sidor | 15 |
Tidskrift | Journal of Functional Analysis |
Volym | 265 |
Nummer | 4 |
DOI | |
Status | Publicerad - 15 aug. 2013 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |