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arXiv · 2611.06016

The Maximum Principle and Optimal Gradient Estimates of Solutions to the Insulated Conductivity Problem

Saibo Chen
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Abstract

We study the insulated conductivity problem with two unit spherical inclusions embedded in a bounded domain in $\mathbb{R}^n$ with $n\ge3$. The gradient of solutions may blow up as the distance between the two inclusions goes to zero. We introduce bispherical coordinates and expand the solution in spherical harmonics. Then we use the maximum principle to give a new proof of the optimal gradient estimate obtained by Dong-Li-Yang.

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Saibo Chen. 2026-11-04. The Maximum Principle and Optimal Gradient Estimates of Solutions to the Insulated Conductivity Problem. https://arxiv.org/abs/2611.06016

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