Type: Article
Publication Date: 1996-01-01
Citations: 74
DOI: https://doi.org/10.1090/s0002-9939-96-03214-5
We show that the Lorentz space $\Lambda ^1(w)$ is a Banach space if and only if the Hardy-Littlewood maximal operator $M$ satisfies a certain weak-type estimate. We also consider the case of general measures. Finally, we study some properties of several indices associated to these spaces.