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arXiv 2106.09804math.APmath-phmath.MPmath.SP
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改进的Hardy-Rellich不等式

Improved Hardy-Rellich inequalities

Biagio Cassano, Lucrezia Cossetti, Luca Fanelli

摘要:

研究扰动拉普拉斯算子的Hardy-Rellich不等式。特别是,我们表明,一个非平凡的角度扰动的自由运营商通常改善的不等式,也可能提供一个估计,不举行的自由的情况下。主要的例子与磁场的引入有关:这是反磁现象的一种表现,Laptev和Weidl在\cite{LW1999}中观察到了哈代不等式,后来埃文斯和刘易斯在\cite{EL2005}中观察到了雷利希不等式;然而,据我们所知,所谓的哈代-雷利希不等式还没有在这方面进行过研究。在给出最优不等式后,我们证明了最优常数不是由估计域中的任何函数获得的。

英文摘要:

We investigate Hardy-Rellich inequalities for perturbed Laplacians. In particular, we show that a non-trivial angular perturbation of the free operator typically improves the inequality, and may also provide an estimate which does not hold in the free case. The main examples are related to the introduction of a magnetic field: this is a manifestation of the diamagnetic phenomenon, which has been observed by Laptev and Weidl in \cite{LW1999} for the Hardy inequality, later by Evans and Lewis in \cite{EL2005} for the Rellich inequality; however, to the best of our knowledge, the so called Hardy-Rellich inequality has not yet been investigated in this regards. After showing the optimal inequality, we prove that the best constant is not attained by any function in the domain of the estimate.

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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