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Bibliographic Details
Main Authors: Liu, Qing, Manfredi, Juan J., Zhou, Xiaodan
Format: Preprint
Published: 2025
Subjects:
Online Access:https://arxiv.org/abs/2508.17106
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Table of Contents:
  • We establish a superposition principle in disjoint variables for the inhomogeneous infinity-Laplace equation. We show that the sum of viscosity solutions of the inhomogeneous infinity-Laplace equation in separate domains is a viscosity solution in the product domain. This result has been used in the literature with certain particular choices of solutions to simplify regularity analysis for a general inhomogeneous infinity-Laplace equation by reducing it to the case without sign-changing inhomogeneous terms and vanishing gradient singularities. We present a proof of this superposition principle for general viscosity solutions. We also explore generalization in metric spaces using cone comparison techniques and study related properties for general elliptic and convex equations.