In our paper, we prove that if the positive part u +(x) of a harmonic function u(x) in a half space satisfies the condition of slow growth, then its negative part u −(x) can also be dominated by a similar growth condition. Moreover, we give an integral representation of the function u(x). Further, a solution of the Dirichlet problem in the half space for a rapidly growing continuous boundary function is constructed by using the generalized Poisson integral with this boundary function.
Similar content being viewed by others
References
S. Axler, P. Bourdon, and W. Ramey, Harmonic Function Theory, 2nd Ed., Springer-Verlag, New York (1992).
T. Carleman, “Über die Approximation analytischer Funktionen durch lineare Aggregate von vorgegebenen Potenzen,” Ark. Mat., Astron. Och Fys., 17, 1–30 (1923)
M. Finkelstein and S. Scheinberg, “Kernels for solving problems of Dirichlet type in a half plane,” Adv. Math., 18, No. 1, 108–113 (1975).
S. J. Gardiner, “The Dirichlet and Neumann problems for harmonic functions in half spaces,” J. London Math. Soc., 24, 502–512 (1981).
W. K. Hayman and P. B. Kennedy, Subharmonic Functions, Academic Press, London, Vol. 1 (1976)
Ü. Kuran, “Study of superharmonic functions in R n × (0, ∞) by a passage to R n+3,” Proc. London Math. Soc., 20, 276–302 (1970).
G. S. Pan and G. T. Deng, “Growth estimates for a class of subharmonic functions in the half plane,” Acta Math. Sci. Ser. A. Chin. Ed., 31, 892–901 (2011).
D. Siegel and E. Talvila, “Sharp growth estimates for modified Poisson integrals in a half space,” Potential Anal., 15, 333–360 (2001).
E. M. Stein, Harmonic Analysis, Princeton Univ. Press, Princeton, New Jersey (1993).
G. Szegö, “Orthogonal polynomials,” Amer. Math. Soc. Colloq. Publ., 23 (1975).
H. Yoshida, “A type of uniqueness of the Dirichlet problem on a half space with continuous data,” Pacif. J. Math., 172, 591–609 (1996).
Y. H. Zhang, G. T. Deng, and K. Kou, “On the lower bound for a class of harmonic functions in the half space,” Acta Math. Sci. Ser. B. Engl. Ed., 32, No. 4, 1487–1494 (2012).
Author information
Authors and Affiliations
Additional information
Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 66, No. 10, pp. 1367–1378, October, 2014.
Rights and permissions
About this article
Cite this article
Qiao, L. Dirichlet Problems for Harmonic Functions in Half Spaces. Ukr Math J 66, 1530–1543 (2015). https://doi.org/10.1007/s11253-015-1029-9
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11253-015-1029-9