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arXiv 2204.01441math.CA
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度量测度空间上Muckenhoupt类和逆Hölder类的极限条件

Limiting conditions of Muckenhoupt and reverse Hölder classes on metric measure spaces

Emma-Karoliina Kurki

摘要:

自然极大和极小函数与$A_\infty$上的对数逐点可换。利用这一结果刻画了度量测度空间上的$A_1$和$RH_\infty$空间.作为Muckenhoupt $A_p$和逆Hölder类的极限情形,它们的行为是显著对称的。在一般的度量测度空间上,为了在$A_p$和逆Hölder描述之间传递,需要一个额外的几何假设。最后,我们应用的特征给出了几个已知的性质的$A_1$和$RH_\infty$,包括一个精炼的琼斯因子分解定理的简单证明。另外,我们给出了自然极大函数的一个有界性结果。

英文摘要:

The natural maximal and minimal functions commute pointwise with the logarithm on $A_\infty$. We use this observation to characterize the spaces $A_1$ and $RH_\infty$ on metric measure spaces with a doubling measure. As the limiting cases of Muckenhoupt $A_p$ and reverse Hölder classes, respectively, their behavior is remarkably symmetric. On general metric measure spaces, an additional geometric assumption is needed in order to pass between $A_p$ and reverse Hölder descriptions. Finally, we apply the characterization to give simple proofs of several known properties of $A_1$ and $RH_\infty$, including a refined Jones factorization theorem. In addition, we show a boundedness result for the natural maximal function.

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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