arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.10034math.CAmath.COmath.FAmath.MG
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无限根$k$ -叉树上Hardy-Littlewood极大函数的Festhiman-Stein不等式

Fefferman-Stein inequalities for the Hardy-Littlewood maximal function on the infinite rooted $k$-ary tree

Sheldy Ombrosi, Israel P. Rivera-Ríos, Martín D. Safe

摘要:

本文给出了{无限根} $k$ -叉树上Hardy-Littlewood极大函数的加权端点估计.受Naor和Tao的启发,确定了下面的Favorman-Stein估计\[ w\left(\left\{ x\in T\,:\,Mf(x)>λ\right\} \right)\leq c_{s}\frac{1}λ\int_{T}|f(x)|M(w^{s})(x)^{\frac{1}{s}}dx\qquad s>1 \],而且它{显示它}是尖锐的,在这个意义上,如果$s=1$,它一般不成立。一些例子的非平凡的权重,使加权弱型$(1,1)$估计举行。得到了一个{强} Festivalman-Stein型估计,并由此得到了一些向量值扩张.在附录中建立了Soria和Tradacete关于无限树的抽象{定理}的加权对应。

英文摘要:

In this paper weighted endpoint estimates for the Hardy-Littlewood maximal function on {the infinite rooted} $k$-ary tree are provided. Motivated by Naor and Tao the following Fefferman-Stein estimate \[ w\left(\left\{ x\in T\,:\,Mf(x)>λ\right\} \right)\leq c_{s}\frac{1}λ\int_{T}|f(x)|M(w^{s})(x)^{\frac{1}{s}}dx\qquad s>1 \] is settled and moreover it {is shown it} is sharp, in the sense that it does not hold in general if $s=1$. Some examples of non trivial weights such that the weighted weak type $(1,1)$ estimate holds are provided. A {strong} Fefferman-Stein type estimate and as a consequence some vector valued extensions are obtained. In the Appendix a weighted counterpart of the abstract {theorem} of Soria and Tradacete on infinite trees is established.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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