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arXiv · 2610.05866

A rigidity result for the weighted p-Laplace equation in higher dimensions

Ching-Lung Lin·Yi-Hsuan Lin
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Abstract

We study rigidity for the weighted $p$-Laplace equation on smooth bounded domains in dimensions three and higher. We show that a smooth positive weight sufficiently close to $1$ is identically $1$ if the derivative of its Dirichlet-to-Neumann map at one affine boundary value agrees with that for the unit weight. We also prove local rigidity at every smooth positive reference weight which is constant in one direction. The reference weight need not be close to $1$, and the unknown weight is only required to be sufficiently close to it, without a directional restriction. No convexity, analyticity, or agreement near the boundary is assumed. The proof combines linearization at a solution without critical points with recent rigidity results for the anisotropic Calderón problem. An identity for the linearized conductivity tensors removes the remaining diffeomorphism. This last step does not require smallness of either weight.

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Ching-Lung Lin, Yi-Hsuan Lin. 2026-10-05. A rigidity result for the weighted p-Laplace equation in higher dimensions. https://arxiv.org/abs/2610.05866

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