Hölder's inequality and its reverse—A probabilistic point of view

Lorenz Frühwirth and Joscha Prochno

Mathematische Nachrichten, 2023, vol. 296, issue 12, 5493-5512

Abstract: In this article, we take a probabilistic look at Hölder's inequality, considering the ratio of terms in the classical Hölder inequality for random vectors in Rn$\mathbb {R}^n$. We prove a central limit theorem for this ratio, which then allows us to reverse the inequality up to a multiplicative constant with high probability. The models of randomness include the uniform distribution on ℓpn$\ell _p^n$ balls and spheres. We also provide a Berry–Esseen–type result and prove a large and a moderate deviation principle for the suitably normalized Hölder ratio.

Date: 2023
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https://doi.org/10.1002/mana.202200411

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