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Resumen de Semiregular and strongly irregular boundary points for p-harmonic functions on unbounded sets in metric spaces

Anders Björn, Daniel Hansevi

  • The trichotomy between regular, semiregular, and strongly irregular boundary points for p-harmonic functions is obtained for unbounded open sets in complete metric spaces with a doubling measure supporting a p-Poincaré inequality, 1 p \infty. We show that these are local properties. We also deduce several characterizations of semiregular points and strongly irregular points. In particular, semiregular points are characterized by means of capacity, p-harmonic measures, removability, and semibarriers.


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