Spaces of Bounded Measurable Functions Invariant Under a Group Action

Abstract

In this paper we characterize spaces of $L^\infty$-functions on a compact Hausdorff space that are invariant under a transitive and continuous group action. This work generalizes the author's 2021 results concerning the specific case of unitarily and M\"obius invariant spaces of $L^\infty$-functions defined on the unit sphere in $\mathbb{C}^n$.