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arXiv 2202.09241math.AP
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Heisenberg群$\mathbb{H}^n$和CR球面$\mathbb{S}^{2n+1}$上的逆Hardy-Littlewood-Sobolev不等式

Reversed Hardy-Littlewood-Sobolev inequality on Heisenberg group $\mathbb{H}^n$ and CR sphere $\mathbb{S}^{2n+1}$

Yazhou Han, Shutao Zhang

摘要:

本文主要研究Heisenberg群$\mathbb{H}^n$和CR球$\mathbb{S}^{2n+1}$上的逆Hardy-Littlewood-Sobolev(HLS)不等式.首先,我们建立了一个大致反向的HLS不等式,并给出了sharp常数的一个明确的下界。然后,利用次临界方法和一些紧性技巧证明了具有锐常数的极值函数的存在性。我们的方法不需要重排,可以用来研究经典的HLS不等式和其它类似的不等式。

英文摘要:

This paper is mainly devoted to the study of the reversed Hardy-Littlewood-Sobolev (HLS) inequality on Heisenberg group $\mathbb{H}^n$ and CR sphere $\mathbb{S}^{2n+1}$. First, we establish the roughly reversed HLS inequality and give a explicitly lower bound for the sharp constant. Then, the existence of the extremal functions with sharp constant is proved by subcritical approach and some compactness techniques. Our method is rearrangement free and can be applied to study the classical HLS inequality and other similar inequalities.

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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