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arXiv · 1508.05554

Bohnenblust-Hille inequalities for Lorentz spaces via interpolation

Andreas Defant·Mieczysław Mastyło
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Abstract

We prove that the Lorentz sequence space $\ell_{\frac{2m}{m+1},1}$ is, in a~precise sense, optimal among all symmetric Banach sequence spaces satisfying a Bohnenblust-Hille type inequality for $m$-linear forms or $m$-homogeneous polynomials on $\mathbb{C}^n$. Motivated by this result we develop methods for dealing with subtle Bohnenblust-Hille type inequalities in the setting of Lorentz spaces. Based on an interpolation approach and the Blei-Fournier inequalities involving mixed type spaces, we prove multilinear and polynomial Bohnenblust-Hille type inequalities in Lorentz spaces with subpolynomial and subexponential constants. Improving a remarkable result of Balasubramanian-Calado-Queffélec, we show an application to the theory of Dirichlet series.

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Andreas Defant, Mieczysław Mastyło. 2015-08-23. Bohnenblust-Hille inequalities for Lorentz spaces via interpolation. https://arxiv.org/abs/1508.05554

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