Stability of Hyperplane Projections of the Regular Simplex and $L_p$-Projection Bodies of balls in $\ell_q^n(\mathbb{R})$
Year: 2026
Type: preprint
Abstract: We prove stability estimates for extremal hyperplane projections of the regular simplex. We further generalize the analogous stability estimates for $\ell_q$-balls by the first named author and the monotonicity theorem for normalized ratios by Barthe and Naor to the $L_p$-setting. To this end, we derive closed formulas for the support functions of their $L_p$-projection bodies, complementing those obtained by the second named author. A key ingredient in our proofs is a stability refinement of the majorization inequality for Gaussian mixtures.
Source: arXiv (Cornell University)
Authors: Jakimiuk, Jacek, Pandis, Christos
Language: English
Subfield: Applied Mathematics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222978388