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arXiv · 1507.06099

Remarks on the Hardy--Littlewood inequality for $m$-homogeneous polynomials and $m$-linear forms

W. Cavalcante·D. Nunez-Alarcon·D. Pellegrino
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Abstract

The Hardy--Littlewood inequality for $m$-homogeneous polynomials on $\ell_{p}$ spaces is valid for $p>m.$ In this note, among other results, we present an optimal version of this inequality for the case $p=m.$ We also show that the optimal constant, when restricted to the case of $2$-homogeneous polynomials on $\ell_{2}(\mathbb{R}^{2})$ is precisely $2$. In an Appendix we justify why, curiously, the optimal exponents of the Hardy--Littlewood inequality do not behave smoothly.

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W. Cavalcante, D. Nunez-Alarcon, D. Pellegrino. 2015-07-22. Remarks on the Hardy--Littlewood inequality for $m$-homogeneous polynomials and $m$-linear forms. https://arxiv.org/abs/1507.06099

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