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arxiv: 1211.5703 · v1 · pith:ZY2YBMWInew · submitted 2012-11-24 · 🧮 math.CV

Multipliers of Dirichlet subspaces of the Bloch space

classification 🧮 math.CV
keywords mathcalspaceinftyblochmultipliersmathbbsubspacesanalytic
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For $0<p<\infty $ we let $\mathcal D^p_{p-1}$ denote the space of those functions $f$ which are analytic in the unit disc $\mathbb D $ and satisfy $\int_\mathbb D (1-| z|)\sp {p-1}| f'(z)| \sp p\,dA(z)<\infty $. It is known that, whenever $p\neq q$, the only multiplier from $\mathcal D^p_{p-1} $ to $\mathcal D^q_{q-1} $ is the trivial one. However, if $X$ is a subspace of the Bloch space and $0<p\le q<\infty$, then $X \cap \mathcal D^p_{p-1}\subset X\cap \mathcal D^q_{q-1} $, a fact which implies that the space of multipliers $\M(\mathcal D^p_{p-1}\cap X, \mathcal D^q_{q-1} \cap X)$ is non-trivial. In this paper we study the spaces of multipliers $\M(\mathcal D^p_{p-1}\cap X, v\cap X)$ ($0<p,q<\infty $) for distinct classical subspaces $X$ of the Bloch space. Specifically, we shall take $X$ to be $H^\infty $, $BMOA$ and the Bloch space $\mathcal B $.

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