The Mixed Norm Spaces of Polyharmonic Functions

Author: Hu Zhangjian   Pavlović Miroslav   Zhang Xuejun  

Publisher: Springer Publishing Company

ISSN: 0926-2601

Source: Potential Analysis, Vol.27, Iss.2, 2007-09, pp. : 167-182

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Abstract

Let be a bounded domain with C 2 boundary. And let H k be the set of all polyharmonic functions f with order k on Ω. For 0<p, q≤∞ and Φ a normal weight, the mixed-norm space consists of all function f in H k for which the mixed-norm ||·|| p, q, Φ <∞. The main result of the paper is the norm equivalence: where x 0 is a fixed point in Ω, m is a positive integer and is the jth gradient of f. A similar result for Bloch-type spaces is also obtained.