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Bibliographic Details
Main Authors: Hakobyan, Aram, Poghosyan, Michael, Shahgholian, Henrik
Format: Preprint
Published: 2026
Subjects:
Online Access:https://arxiv.org/abs/2602.14305
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Table of Contents:
  • We prove that the gradient of any bounded subharmonic function is upper semi-continuous, provided that its super-level sets can be touched from the exterior by uniform $C^{1,\text{Dini}}$ domains at every point. This idea extends to a class of general operators, as well as to the boundary behaviour of the gradient of solutions of the Dirichlet problem in a domain whose boundary satisfy this geometric condition.