Superharmonic functions on Lipschitz domain
Martin Silverstein, Richard Wheeden (1971)
Studia Mathematica
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Martin Silverstein, Richard Wheeden (1971)
Studia Mathematica
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Carroll, Tom (2002)
Annales Academiae Scientiarum Fennicae. Mathematica
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Zoltan Balogh, Alexander Volberg (1996)
Revista Matemática Iberoamericana
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Björn Dahlbert (1979)
Studia Mathematica
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Alano Ancona (1998)
Publicacions Matemàtiques
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Let L be a symmetric second order uniformly elliptic operator in divergence form acting in a bounded Lipschitz domain Ω of R and having Lipschitz coefficients in Ω. It is shown that the Rellich formula with respect to Ω and L extends to all functions in the domain D = {u ∈ H (Ω); L(u) ∈ L(Ω)} of L. This answers a question of A. Chaïra and G. Lebeau.
Jang-Mei Wu (1978)
Studia Mathematica
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Mitrea, Dorina, Mitrea, Marius (1996)
Electronic Research Announcements of the American Mathematical Society [electronic only]
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Vilhelm Adolfsson, Luis Escauriaza, Carlos Kenig (1995)
Revista Matemática Iberoamericana
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We show that a harmonic function which vanishes continuously on an open set of the boundary of a convex domain cannot have a normal derivative which vanishes on a subset of positive surface measure. We also prove a similar result for caloric functions vanishing on the lateral boundary of a convex cylinder.
Jill Pipher (1987)
Revista Matemática Iberoamericana
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The aim of this paper is to extend the results of Calderón [1] and Kenig-Pipher [12] on solutions to the oblique derivative problem to the case where the data is assumed to be BMO or Hölder continuous.
Rainer Wittmann (1985)
Mathematische Zeitschrift
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Jang-Mei G. Wu (1978)
Annales de l'institut Fourier
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On a Lipschitz domain in , three theorems on harmonic functions are proved. The first (boundary Harnack principle) compares two positive harmonic functions at interior points near an open subset of the boundary where both functions vanish. The second extends some familiar geometric facts about the Poisson kernel on a sphere to the Poisson kernel on . The third theorem, on non-tangential limits of quotient of two positive harmonic functions in , generalizes Doob’s relative Fatou...