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Pointwise convergence and radial limits of harmonic functions. (English) Zbl 1082.31001

Following the work of J. Lukeš, J. Malý, I. Netuka, M. Smrcka and J. Spurný [Isr. J. Math. 134, 255–287 (2003; Zbl 1031.35011)], the authors characterize the real-valued functions on a compact set \(K\) in \(\mathbb{R}^n\) that can be expressed as the pointwise limit of a sequence of functions each of which are harmonic on some neighborhood of \(K\). They also characterize the functions on the unit sphere which are the radial limits of entire harmonic functions.

MSC:

31B05 Harmonic, subharmonic, superharmonic functions in higher dimensions
31B20 Boundary value and inverse problems for harmonic functions in higher dimensions

Citations:

Zbl 1031.35011
Full Text: DOI

References:

[1] Armitage, D. H.; Gardiner, S. J., Classical Potential Theory (2001), London: Springer, London · Zbl 0972.31001
[2] Armitage, D. H.; Goldstein, M., Better than uniform approximation on closed sets by harmonic functions with singularities, Proceedings of the London Mathematical Society, 60, 3, 319-343 (1990) · Zbl 0702.31003 · doi:10.1112/plms/s3-60.2.319
[3] Bliedtner, J.; Hansen, W., Simplicial cones in potential theory, Inventiones Mathematicae, 29, 83-110 (1975) · Zbl 0308.31011 · doi:10.1007/BF01390188
[4] Boivin, A.; Paramonov, P. V., On radial limit functions for entire solutions of second order elliptic equations inR^2, Publications Mathemàtiques, 42, 509-519 (1998) · Zbl 0921.35023
[5] Debiard, A.; Gaveau, B., Potentiel fin et algèbres de fonctions analytiques I, Journal of Functional Analysis, 16, 289-304 (1974) · Zbl 0297.31004 · doi:10.1016/0022-1236(74)90075-5
[6] Deny, J., Sur l’approximation des fonctions harmoniques, Bulletin de la Société Mathématique de France, 73, 71-73 (1945) · Zbl 0063.01088
[7] Deny, J.; Lelong, P., Étude des fonctions sousharmoniques dans un cylindre ou dans un cône, Bulletin de la Société Mathématique de France, 75, 89-112 (1947) · Zbl 0033.06401
[8] Fuglede, B., Finely harmonic functions (1972), Berlin: Springer, Berlin · Zbl 0248.31010
[9] Gaier, D., Lectures on Complex Approximation (1987), Boston: Birkhäuser, Boston · Zbl 0612.30003
[10] S. J. Gardiner,Harmonic Approximation, London Mathematical Society Lecture Note Series221, Cambridge University Press, 1995. · Zbl 0826.31002
[11] Keldyš, M. V., On the solvability and stability of the Dirichlet problem, Uspekhi Mathematicheskikh Nauk, 8, 171-231 (1941) · JFM 67.0340.02
[12] Lukeš, J.; Malý, J.; Netuka, I.; Smrčka, M.; Spurný, J., On approximation of affine Baire-one functions, Israel Journal of Mathematics, 134, 255-287 (2003) · Zbl 1031.35011
[13] Roth, A., Approximationseigenschaften und Strahlengrenzwerte meromorpher und ganzer Funktionen, Commentarii Mathematici Helvetici, 11, 77-125 (1938) · Zbl 0020.23504 · doi:10.1007/BF01199693
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