$L^p$-Minkowski Problem under Curvature Pinching

Author:

Mohammad N. Ivaki, Emanuel Milman

Keyword:

Mathematics, Differential Geometry, Differential Geometry (math.DG), Functional Analysis (math.FA)

journal:

date:

2023-07-30 16:00:00

Abstract

Let $K$ be a smooth, origin-symmetric, strictly convex body in $\mathbb{R}^n$. If for some $\ell\in GL(n,\mathbb{R})$, the metric $\frac{1}{2}D^2 \Vert\cdot\Vert_{\ell K}^2$ is comparable to the standard Euclidean metric of $\mathbb{R}^{n}$ up-to a factor of $\gamma > 1$, we show that $K$ satisfies the even $L^p$-Minkowski inequality and uniqueness in the even $L^p$-Minkowski problem for all $p \geq p_\gamma := 1 - \frac{n+1}{\gamma}$. This result is sharp as $\gamma \searrow 1$ (characterizing centered ellipsoids in the limit) and improves upon the classical Minkowski inequality for all $\gamma < \infty$. In particular, whenever $\gamma \leq n+1$, the even log-Minkowski inequality and uniqueness in the even log-Minkowski problem hold.

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