Regularity theory and traces of -harmonic functions
Regularity theory and traces of -harmonic functions
复制标题
正则性理论和调和函数的迹
DOI:
10.1090/s0002-9947-96-01430-4
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发表时间:
1996
影响因子:
1.3
通讯作者:
E. Villamor
中科院分区:
文献类型:
--
作者:
P. Koskela;J. Manfredi;E. Villamor
In this paper we discuss two different topics concerning Aharmonic functions. These are weak solutions of the partial differential equation div(A(x,∇u)) = 0, where α(x)|ξ|p−1 ≤ 〈A(x, ξ), ξ〉 ≤ β(x)|ξ|p−1 for some fixed p ∈ (1,∞), the function β is bounded and α(x) > 0 for a.e. x. First, we present a new approach to the regularity of A-harmonic functions for p > n−1. Secondly, we establish results on the existence of nontangential limits for A-harmonic functions in the Sobolev space W 1,q(B), for some q > 1, where B is the unit ball in Rn. Here q is allowed to be different from p.