# Weighted composition operators in functional Banach spaces: an axiomatic approach

## TL;DR

This paper develops an axiomatic framework for analyzing weighted composition operators on broad classes of Banach spaces of analytic functions, generalizing existing results and characterizing invertible operators.

## Contribution

It introduces a minimal axiomatic approach to study weighted composition operators, extending known results and providing new characterizations on general Banach spaces.

## Key findings

- Characterization of spaces where all bounded analytic functions are multipliers
- Generalized conditions for weighted composition operators
- Descriptions of invertible weighted composition operators

## Abstract

We work with very general Banach spaces of analytic functions in the disk or other domains which satisfy a minimum number of natural axioms. Among the preliminary results, we discuss some implications of the basic axioms and identify all functional Banach spaces in which every bounded analytic function is a pointwise multiplier. Next, we characterize (in various ways) the weighted composition operators among the bounded operators on such spaces, thus generalizing some well-known results on multiplication or composition operators. We also characterize the invertible weighted composition operators on the disk and on general Banach spaces of analytic functions on bounded domains under different sets of axioms whose connections we discuss by providing appropriate examples. This generalizes and complements various recent results by Gunatillake, Bourdon, and Hyv\"arinen-Lindstr\"om-Nieminen-Saukko.