## Illinois Journal of Mathematics

### On analytic and meromorphic functions and spaces of $Q\sb K$-type

#### Abstract

Starting from a nondecreasing function $K:[0,\infty)\to [0,\infty)$, we introduce a M\"obius-invariant Banach space $Q_K$ of functions analytic in the unit disk in the plane. We develop a general theory of these spaces, which yields new results and also, for special choices of $K$, gives most basic properties of $Q_p$-spaces. We have found a general criterion on the kernels $K_1$ and $K_2$, $K_1\leq K_2$, such that $Q_{K_2}\subsetneqq Q_{K_1}$, as well as necessary and sufficient conditions on $K$ so that $Q_K=\mathcal{B}$ or $Q_K =\mathcal{D}$, where the Bloch space $\mathcal{B}$ and the Dirichlet space $\mathcal{D}$ are the largest, respectively smallest, spaces of $Q_K$-type. We also consider the meromorphic counterpart $Q_K^\#$ of $Q_K$ and discuss the differences between $Q_K$-spaces and $Q_K^\#$-classes.

#### Article information

Source
Illinois J. Math., Volume 46, Number 4 (2002), 1233-1258.

Dates
First available in Project Euclid: 13 November 2009

https://projecteuclid.org/euclid.ijm/1258138477

Digital Object Identifier
doi:10.1215/ijm/1258138477

Mathematical Reviews number (MathSciNet)
MR1988261

Zentralblatt MATH identifier
1048.30017

#### Citation

Essén, Matts; Wulan, Hasi. On analytic and meromorphic functions and spaces of $Q\sb K$-type. Illinois J. Math. 46 (2002), no. 4, 1233--1258. doi:10.1215/ijm/1258138477. https://projecteuclid.org/euclid.ijm/1258138477