Recent Developments in the Theory of Lorentz Spaces and Weighted Inequalities
| dc.creator | Carro, Maria J. | |
| dc.creator | Raposo, Jose A. | |
| dc.creator | Soria, Javier | |
| dc.date | 2000-10-02 | |
| dc.date.accessioned | 2026-07-07T04:37:46Z | |
| dc.date.available | 2026-07-07T04:37:46Z | |
| dc.description | The main objective of this work is to bring together two well known and, a priori, unrelated theories dealing with weighted inequalities for the Hardy-Littlewood maximal operator $M$, and thus, we consider the boundedness of $M$ in the weighted Lorentz space $Λ^p_u(w)$. Two examples are historically relevant as a motivation: If $w=1$, this corresponds to the study of the boundedness $M:L^p(u)\longrightarrow L^p(u),$ which was characterized by B. Muckenhoupt, giving rise to the so called $A_p$ weights. The second case is when we take $u=1$. This is a more recent theory, and was completely solved by M.A. Ariño and B. Muckenhoupt in 1991. It turns out that the boundedness $M:\llo\longrightarrow\llo,$ can be seen to be equivalent to the boundedness of the Hardy operator $A$ restricted to decreasing functions of $L^p(w)$. The class of weights satisfying this boundedness is known as $B_p$. Even though the $A_p$ and $B_p$ classes enjoy some similar features, they come from very different theories, and so are the techniques used on each case: Calderón--Zygmund decompositions and covering lemmas for $A_p$, rearrangement invariant properties and positive integral operators for $B_p$. It is our aim to give a unified version of these two theories. Contrary to what one could expect, the solution is not given in terms of the limiting cases above considered (i.e., $u=1$ and $w=1$), but in a rather more complicated condition, which reflects the difficulty of estimating the distribution function of the Hardy-Littlewood maximal operator with respect to general measures. | |
| dc.description | viii+116 pp | |
| dc.identifier | https://arxiv.org/abs/math/0010010 | |
| dc.identifier | http://arxiv.org/abs/math/0010010 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/60026 | |
| dc.subject | Classical Analysis and ODEs | |
| dc.subject | Functional Analysis | |
| dc.subject | 42B25 (26D10, 26D15, 46E30, 47B38, 47G10) | |
| dc.title | Recent Developments in the Theory of Lorentz Spaces and Weighted Inequalities | |
| dc.type | text |