The Persson--Stepanov theorem revisited
Functional Analysis
2025-07-02 v1 Analysis of PDEs
Classical Analysis and ODEs
Abstract
We develop a new proof of the result of L.-E.~Persson and V.D.~Stepanov \cite[Theorems 1 and 3]{Per:02}, which provides a characterization of a Hardy integral inequality involving two weights, and which can be applied to an effective treatment of the geometric mean operator. Our approach enables us to extend their result to the full range of parameters, in particular involving the critical case , which was excluded in the original work. Our proof avoids all duality steps and discretization techniques and uses solely elementary means.
Cite
@article{arxiv.2507.00867,
title = {The Persson--Stepanov theorem revisited},
author = {Amiran Gogatishvili and Luboš Pick and Hana Turčinová and Tuğçe Ünver},
journal= {arXiv preprint arXiv:2507.00867},
year = {2025}
}