Submitted Paper

Inserted: 19 jan 2025
Last Updated: 19 jan 2025

Year: 2025

Abstract:

The Borell-Brascamp-Lieb inequality is a classical extension of the Pr´ekopa-Leindler inequality, which in turn is a functional counterpart of the Brunn-Minkowski inequality. The stability of these inequalities has received significant attention in recent years. Despite substantial progress in the geometric setting, a sharp quantitative stability result for the Pr´ekopa-Leindler inequality has remained elusive, even in the special case of log-concave functions. In this work, we provide a unified and definitive stability framework for these foundational inequalities. By establishing the optimal quantitative stability for the Borell-Brascamp-Lieb inequality in full generality, we resolve the conjectured sharp stability for the Pr´ekopa-Leindler inequality as a particular case. Our approach builds on the recent sharp stability results for the Brunn-Minkowski inequality obtained by the authors.

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• Sharp-quantitative-stability-for-the-pre@kopa-leindler-and-borell-brascamp-lieb-inequalities.pdf